I need help with userform create list of teams no repeated

I have a userform for the NFL playoffs. 14 combo boxes for wild card & Divisional only. I want to create a search with no repeat, and after I  pick team, should not the list should not be repeated.  Dark red is for AFC TEAMS  and dark blue is for NFC TEAMS. I  have listed teams on the teams info worksheet.   I need help getting this working