Marketing costs not accurate

Hey everybody! I’ve been struggling to sell on Amazon and have contemplated liquidating my inventory and just moving on because things have gone so terribly. About two or three weeks ago, I decided to cut my marketing costs to almost nothing. My cells have actually stayed steady and I’m in the green. But yesterday I logged in to my seller Central and what was projected to be a $400 payout on August 10 is now -$118. The massive line item that took it to -$118 is Marketing… Which I have only spent $100 in the past week. Is Amazon screwing me over?