I average about $10 a day, and yesterday, pepperjam said I earned $322, which I know is false. This had happened once before, and they took the amount away in about 3 days. What's going on with pepperjam, can't they get their number right? apparently they hired some crappy programmers.
I wouldn't be so quick to dismiss it. If you rely on SEO and pagerank for traffic how do you know that your site hasn't taken a major shift in SERP? I'm not saying it's correct or not but a spike in earnings can happen. Consult your affiliate manager anyway.
I'm sure if it is a mistake then they will fix it unless there are going to pay you more which is a good thing.