Just delete these files and you are good to go
addons/sourcemod/data/sqlite/sourcebans-queue.sq3
addons/sourcemod/data/sqlite/sourcecomms-queue.sq3
Most likely they stuck in the queue and every often it overwrites the banned ip or user cfg even if you unban and write the cfg.
Also i forgot to tell, you can check whats inside the sq3 files fast without any software just drag'n' drop here
https://inloop.github.io/sqlite-viewer/