Oh yes. Lots of kitties around here have "rainbow" spreadsheets, with huge dives down and rocketing back up again. Some kitties arrive in high numbers and take a long time to come down at all. Some, like Monkey, are low for a while, then high for a while, then low for a while...
The reasons for these patterns vary from cat to cat and can take time to figure out. In Monkey's case, as I said, I worry that there might be something else going on, but there are other possibilities for sure. Most straightforwardly, it could be that going from 3U to 1U (and then quickly down to 0.75U) was just too much of a reduction, with the good initial numbers (and the reduction) coming from the 3.0U depot. But, with him on SLGS, I don't want to recommend going back up just quite yet, let's see what he does tonight and get some other opinions about this first.