I thought I noticed some differences last month as well, but didn’t have time to really dive in. (And it was pretty close anyway)
I do remember there was some weird glitch in the graphs on the web dashboard for the stefan-benten satellite earlier. Could it be related, maybe there is some faulty accounting for transfers on either the node side or satellite side? I’m not at home right now, but I’ll try to do a similar comparison between the numbers this weekend for my own node.