It would be wonderful if people posting could change up the posts they are putting up in their various communities. I just had to go through 25 different posts that were marked as spam by members I know are active and valid.
It seems to me that if a person is posting the same post in several communities that it comes across as spam according to the Skool platform.
In order to ensure your posts are accepted, it may be wise to change the title of the post (use different words to say the same thing). As well as change some of the language within the post itself. When you post the same post in multiple communities.
Just an FYI, I am sure the other admins would agree entirely....