Polar,
I had a Pay2k fiasco with my change of CEQ from SSgt Tech to FofS. The FSA was supposed to refer my case to MCM Div, then pay me the diffrence in wages. S/he paid me the difference but did not raise a Checkpoint issue with the Pay system. As I arrived in my new Unit, the FSA here has spent 2 months digging through the carnage of my pay file. MCM Div are blissfully unaware that my pay is screwed (as they have never been told) and I may have been paid illegally. The Difference over 2 years between SSGT tech and FofS is a few grand, which ended up in my sky rocket. I live in fear of a negative wage packet as they recover the cash.
With Pay2000 you are guaranteed a minimum pay increase of 2% to the nearest increment. A Sgt tech level 4 (H) for example needs to transfer to the nearest level on promotion to SSgt. This might be Level 5 (L) if the Level 5 rate of pay + 2% is lower than 4(H) then he must go on to Level 5.
Another misconception held by some FSA's is that if you are promoted within Pay2k that you mark time until your length of time in rank matches the level of pay. Not so. As a newly promoted Level 5 (L) SSgt, you would increase to level 6 (L) 12 months after promotion. Assuming that you are a trade going from H to L at SSgt, you will top out at Level 7 as a SSgt.
This issue is close to my heart, having been seen off by Pay 2 k, and if you have any other questions, I will advise you accordingly. Hope you get sorted soon.