Why can’t I have 1+ working combo boxes

I am not an access guru but I feel I am an intermediate but I am trying to setup a Information Systems Service Request Form. I have all my employees data in a seperate table and a blank table waiting to be filling up with requests. On the form I made I have various user data combo boxes but The only one that works is the combo box that is directed to the 1st colomn in the table I have all the data in. And everyother combo box uses that same colomn, EVEN THOUGH it is directed to go to the others that it is specified to. This has been driving me crazy for days and I can’t seem to find the answer, Please help me out.

thanks