Alright i'm editing this for a step by step process, MANI IS A PAIN IN THE ASS
1: In ftp go to, orangebox/cstrike/cfg/mani_admin_plugin and open up the banlist remove them there
2: Go to orangebox/cstrike/cfg and delete them from banned_user.cfg
In the case you just banned them from the servers actual ban list, they will be added to the autokick_name folder in the mani_admin_plugin folder, and make sure to check step 1 and 2 after you cleared them from the autokick_name.txt file.
3: orangebox/cstrike/cfg/mani_admin_plugin/autokick_name.txt