Hi gmatjj,
I have a few questions about your prior studies and your overall goals:
1) When you scored 600 and 620, what were your Quant and Verbal Scaled Scores for those tests?
2) How long did you spend studying before each of those GMATs?
3) What resources did you use during your prior studies?
4) When are you planning to apply to Business School?
5) Are you comfortable with the idea that you might have to work with 2 different companies (one for your GMAT and one for your applications)?
GMAT assassins aren't born, they're made,
Rich