We were told in training from both the Director of Flight Ops and System Chief Pilot that, on a month to month basis, we would either be bidding as a CA and paid CA rates, or bidding as FO and be paid the blended rate, unless we flew as a CA then of course that would be paid at CA rates. All of the CQFO's that got done were told from crew planning that they would be bidding as CA for March, and were paid accordingly (not counting the other mistakes that payroll has already made). Looks like Illinois pilot has been paid incorrectly (all of my pay checks have been wrong in some way or another since finishing training). If this stuff keeps up it will be making a lot of folks pretty angry pretty quickly.