[BUG] Fallback Channel Method Bugs

[Coolguy3289]

Describe the bug
Categories usually have a max channel limit of 50, this is checked in thread.py however there is a bug in the Discord API where a category having 49 channels is returning "Category has reached the maximum number of channels" causing the thread creation to fail since the check to trigger the fallback category functionality is contingent on the category having 50 channels.

Bot Info
Bot version (check with @modmail about): 3.9.3
Host method (Heroku, self-host, etc): Self-Host

Error Logs
http://haste.thegamingcorner.net/imelisejom.sql
After some extra Debug Logging
http://haste.thegamingcorner.net/igelukovez.sql

[Coolguy3289]

After making the change, I'm now seeing this issue:

The bot is creating categories with only one channel, and not filling them

[Jerrie-Aries]

That's kinda weird. It's like the bot didn't save the new 'fallback_category_id' or something.

[Coolguy3289]

Well it did, and it used that category, but once it was filled up, it didn't migrate/update the config for the new one. Rather, it did, created the new thread and seems to have just dumped it for the old value. I've tried removing the config value and it's doing the same thing.