My new calibration solutions came today. My old calibration solutions were definitely contaminated, I assume from rinse water.
New solution > Old solution
7 > 7.2
4 > 4.4
10 > 10
I didn't use the 10pH solution as often as the other two. So, word of warning. I thought my funky readings meant my meter was busted, but it was just that the solutions were off.