It could also be the time of month effect.
being the 6th day of the month, those with more gate/lease expenses are bogged down with that bill paid at the month change. Towards the end of the month, when a players Higher DOP effect shows in full force, you really climb up the ranks.
you yourself are just a day or two past paying off the debt/lease expenses. from here on out it's pretty much all profit. you'll see the rank jump up a bit as time passes.