I expected to see: a custom field group only showing up on the post type it was assigned to (in this case posts), but the field group is showing on every post type throughout the whole site. My staging site is still running 3.2.4 and this problem is not occuring. Our live site is running 3.2.5 and the custom fields are showing up everywhere.
I have one other user reporting the same. I cannot reproduce the issue locally, and visiting their site on the backend I couldn't see the problem either, meaning it is likely a caching issue.
If you have a caching plugin can you flush the cache, and with your browser can you clear the cache and do a hard reload on the post edit screens.
I cleared the cache and that didn't make a difference, but when I rolled back to 3.2.4 the problem went away so I'm still thinking this is a coding error. I just noticed that 3.2.6 is out do you happen to know what changed between .6 and .5?
I can't tell you if it will fix your issue, because I've been unable to reproduce it, but it would certainly be helpful to know if you update whether it does.
I can confirm that 3.2.6 did not fix my issue. I have disabled all plugins except for Toolset Types and the problem remains. I have also changed out my theme and cleared the cache again and the problem remains.
This is only happening for my custom fields that are linked to posts. All other custom fields related to custom post types are working as expected. While testing I change the field group to other custom post types and pages and everything worked as expected. Luckily when I changed the field group back to posts only it is now working correctly. Maybe you can make this suggestion to your other user.