select multiple sections for one blog post

ok thanks. This is what i assumed. so i set up each section as a category instead but am having trouble filtering the post path by category. I'm assuming i can do this in the settings but i can't get it to work correctly?

any advise much appreciated

I have 2 blogs on one site www.helm.co.UK/commercial and www.helm.co.UK/residential. Both initially used sections to separate the blog posts. But most blogs need to go under both sections so I have changed to categories which work perfectly apart from the post slug.

So am after some advise on if I can give this a category slug?

previous Blog post page path was /{sectionSlug}/news/post.php?s={postSlug}

so i'm after /{catSlug}/news/post.php?s={postSlug}

Thanks

of course! That makes sense. i have fixed it i used: post.php?s={postSlug}

just removed the sections slug.

Thanks