I have no idea why, but my Experian score climbed 14 points over the weekend. The odd thing is my credit report is exactly the same - I reviewed it inside and out and there is absolutely no change whatsoever.
Something did change. Your accounts aged a month, right? Don't worry, next week your score will probably drop below where you were before! (FICO uses those "imaginary" numbers that you learned in algebra class, and you wondered, "What the hell will we use imaginary numbers for anyway?")