Was just thinking about you yesterday, figured work got busy.
I've had my alk spike up, and down, and I've found that despite the up or down, just turning everything off and testing until everything levels out works best.
I also suspect that my alk is about 1 dKH point off from reality, which doesn't matter to me, as long as I have a baseline of consistency. I've been at 7.5 for years, but when my water was tested with lab grade testing equipment, it was 8.4
I guess there's the old faithful big water change option?