I was kind of thrown into this whole situation when our Engineer left, so this is all new to me, but I'll do my best to keep up with you all.
CBlunt: We use WDS with MDT, so as far as I know we don't input an administrative password until after the PXE. As for your other question, every name that I give a machine is also done with WDS and they have been brand new names.
themightymrp and Arthur: I will try giving the powershell script a shot. I did try adding the admin login to the unattend file to test but that didn't seem to change anything.
Sorry for leaving out the WDS information, I'm just piecing all this together as I go.
Thanks all.
UPDATE:
Tried creating the Auto Logon script but no change.