I was playing around with a new Subclass idea i had in mind and when i was starting to test it and search for error i might have made i noticed that my characters were not getting the correct version. Sometimes even the simplest modifiers like granting blindsense with set base: blindsense wouldn't work for some strange reason. Now after a day of trying to delete the subclass or copying it into a new and fresh homebrew class it suddenly work for my character even though i changed nothing for a good while now. Still now i have the problem that my wizard subclass is supposedly to similar to the druid subclass circle of spores and additionally it says that it does not have the necessary class features with the correct required levels.

Try re-saving the subclass on the main page. If you finished the other stuff after the last time you saved on the main page for the subclass builder, then re-saving it again will trigger it to recheck that everything has been done.