Missing master page from page options

Hi,

There's an odd thing happening: even though I have my master page in templates/pages/, it doesn't show in the page options dropdown (but it shows in the list of master pages). Here's the diagnostic:

Perch Runway: 2.8.32
Production mode: Production (100)
Installed apps: content (2.8.32), assets (2.8.32), categories (2.8.32), collection_1 (2.8.32), collection_2 (2.8.32), perch_forms (1.8.3), collection_3 (2.8.32), perch_members (1.4), perch_podcasts (1.2), perch_twitter (3.6.2)
DB driver: PDO
DB tables: perch2_backup_plans (0), perch2_backup_resources (0), perch2_backup_runs (0), perch2_categories (0), perch2_category_counts (0), perch2_category_sets (0), perch2_collection_index (988), perch2_collection_items (124), perch2_collection_revisions (24), perch2_collections (3), perch2_content_index (680), perch2_content_items (229), perch2_content_regions (99), perch2_forms (2), perch2_forms_responses (3), perch2_members (3), perch2_members_forms (0), perch2_members_member_tags (5), perch2_members_sessions (0), perch2_members_tags (11), perch2_navigation (1), perch2_navigation_pages (15), perch2_page_routes (19), perch2_page_templates (11), perch2_pages (52), perch2_podcasts (2), perch2_podcasts_downloads (7918), perch2_podcasts_episodes (5), perch2_resource_log (1122), perch2_resource_tags (0), perch2_resources (200), perch2_resources_to_tags (0), perch2_settings (20), perch2_twitter_scheduled_tweets (0), perch2_twitter_settings (2), perch2_twitter_tweets (0), perch2_user_passwords (0), perch2_user_privileges (37), perch2_user_role_privileges (40), perch2_user_roles (4), perch2_users (6)
Users: 6
App runtimes:
<?php
    $apps_list = array(
        'content', 
        'categories',
        'perch_members',
        'perch_forms',
        'perch_podcasts',
        'perch_twitter'
    );
Scheduled tasks for perch_twitter: post_tweets (1 mins)
Editor plug-ins: redactor, markitup
H1: beb9ee076fc4e023683af8f6b928fddb
L1: 0617f3d9128331f263d55394cb6dd288
F1: 2edba60ed1f613d6dd804feb202456a2
headerColour: #000000
content_singlePageEdit: 1
helpURL:
siteURL: /
hideBranding: 1
content_collapseList: 1
lang: en-gb
update_2.8.18: done
headerScheme: dark
update_runway_2.8.18: done
latest_version: 2.8.15
on_sale_version: 2.8.34
perch_members_update: 1.4
perch_members_login_page: /members/login.php?r={returnURL}
dashboard: 0
hide_pwd_reset: 0
content_hideNonEditableRegions: 1
content_frontend_edit: 0
logoPath: /perch/resources/1450090096_Logo_300dpi_cmyk.png
update_runway_2.8.32: done
PERCH_DEVELOPMENT: 10
PERCH_STAGING: 50
PERCH_PRODUCTION: 100
PERCH_LOGINPATH: /perch
PERCH_DB_USERNAME: ****
PERCH_DB_SERVER: localhost
PERCH_DB_DATABASE: ****
PERCH_SITEPATH: /home/web/public_html
PERCH_DB_PREFIX: perch2_
PERCH_EMAIL_FROM: ***
PERCH_EMAIL_FROM_NAME: ***
PERCH_PATH: /home/****/public_html/perch
PERCH_CORE: /home/****/public_html/perch/core
PERCH_RESFILEPATH: /home/*****/public_html/perch/resources
PERCH_RESPATH: /perch/resources
PERCH_HTML5: 1
PERCH_TZ: UTC
PERCH_DEBUG:
PERCH_RUNWAY: 1
PERCH_ERROR_MODE: DIE
PERCH_DATE_LONG: %d %B %Y
PERCH_DATE_SHORT: %d %b %Y
PERCH_TIME_SHORT: %H:%M
PERCH_TIME_LONG: %H:%M:%S
PERCH_RUNWAY_ROUTED:
PERCH_STRONG_PASSWORDS:
PERCH_PREVIEW_ARG: preview
PERCH_TEMPLATE_PATH: /home/*****/public_html/perch/templates
PERCH_DEFAULT_DOC: index.php
PERCH_DEFAULT_EXT: .php
PERCH_PRODUCTION_MODE: 100
PERCH_RWD:
PERCH_HTML_ENTITIES:
PERCH_SSL:
PERCH_STRIPSLASHES:
PERCH_PROGRESSIVE_FLUSH: 1
PERCH_PARANOID:
PERCH_FORCE_SECURE_COOKIES:
PERCH_PASSWORD_MIN_LENGTH: 6
PERCH_MAX_FAILED_LOGINS: 10
PERCH_AUTH_LOCKOUT_DURATION: 1 HOUR
PERCH_VERIFY_UPLOADS:
PERCH_AUTH_PLUGIN:
PERCH_DB_CHARSET: utf8
PERCH_DB_PORT:
PERCH_DB_SOCKET:
PERCH_SESSION_TIMEOUT_MINS: 20
PERCH_APPS_EDITOR_PLUGIN: markitup
PERCH_APPS_EDITOR_MARKUP_LANGUAGE: textile
HOSTING SETTINGS

PHP: 7.0.15
Zend: 3.0.0
OS: Linux
SAPI: cgi-fcgi
Safe mode: not detected
MySQL client: mysqlnd 5.0.12-dev - 20150407 - $Id: b5c5906d452ec590732a93b051f3827e02749b83 $
MySQL server: 5.5.5-10.0.29-MariaDB
Free disk space: 102.04 GB
Extensions: Core, date, libxml, openssl, pcre, zlib, filter, hash, pcntl, readline, Reflection, SPL, session, standard, cgi-fcgi, bcmath, bz2, calendar, ctype, curl, dba, dom, enchant, mbstring, fileinfo, ftp, gd, gettext, gmp, iconv, imap, intl, json, ldap, exif, mcrypt, mysqlnd, odbc, PDO, pgsql, Phar, posix, pspell, shmop, SimpleXML, snmp, soap, sockets, sqlite3, sysvmsg, sysvsem, sysvshm, tokenizer, xml, xmlwriter, xsl, zip, mysqli, pdo_mysql, PDO_ODBC, pdo_pgsql, pdo_sqlite, wddx, xmlreader, xmlrpc
GD: Yes
ImageMagick: No
PHP max upload size: 8M
PHP max form post size: 8M
PHP memory limit: 64M
Total max uploadable file size: 8M
Resource folder writeable: Yes
Session timeout: 24 minutes
Native JSON: Yes
Filter functions: Yes
Transliteration functions: Yes
CONTEXT_DOCUMENT_ROOT: /home/*****/public_html
DOCUMENT_ROOT: /home/*****/public_html
GATEWAY_INTERFACE: CGI/1.1
HTTP_ACCEPT: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8
HTTP_ACCEPT_ENCODING: gzip, deflate, sdch
HTTP_ACCEPT_LANGUAGE: en-US,en;q=0.8,fr;q=0.6,la;q=0.4
HTTP_CONNECTION: keep-alive
HTTP_COOKIE: _ga=GA1.3.1872700220.1481126262; cmsa=1; cmssb=0; PHPSESSID=7f2p4ft5c321os49mn7r33vrh1
HTTP_HOST: *****
HTTP_REFERER: https://url/perch/core/settings/diagnostics/
HTTP_UPGRADE_INSECURE_REQUESTS: 1
HTTP_USER_AGENT: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/56.0.2924.87 Safari/537.36
PATH: /bin:/usr/bin
QUERY_STRING: extended
REDIRECT_STATUS: 200
REMOTE_ADDR: 120.50.43.137
REMOTE_PORT: 49908
REQUEST_METHOD: GET
REQUEST_SCHEME: http
REQUEST_URI: /perch/core/settings/diagnostics/?extended
SCRIPT_FILENAME: /home/****/public_html/perch/core/settings/diagnostics/index.php
SCRIPT_NAME: /perch/core/settings/diagnostics/index.php
SERVER_ADDR: 103.11.188.69
SERVER_ADMIN: webmaster@****
SERVER_NAME: ******
SERVER_PORT: 80
SERVER_PROTOCOL: HTTP/1.1
SERVER_SOFTWARE: Apache
UNIQUE_ID: WKz2YBpQJflKaZEcM@VZtgAAAQs
PHP_SELF: /perch/core/settings/diagnostics/index.php
REQUEST_TIME_FLOAT: 1487730272.7107
REQUEST_TIME: 1487730272
argc: 1

Thanks!