Board Thread:Support Requests - Getting Technical/@comment-25286508-20150128071900/@comment-5558012-20150128142430

Did you remove the category from every page and delete the category page itself? If so, I would just say it's a cache issue you will need to wait out. I typed in some categories I had a while ago but were deleted and they no longer show up. Unfortunately I can't give an amount of time to wait but I'm pretty sure the auto-complete for the undesired category will stop when the cache clears.