Yes, upside-down and good point, but right is still right.
The Lube spots are always (I repeat, always) on the right side and I shoot Landscape orientation 99% of the time. They are mostly toward the bottom of the right side, so top as viewed on the photo. The pattern on my AA filter of the spots is nearly identical to those who've posted their Lube spots.
I always change lenses carefully for the last 45 years with no problems like this before.
Some things are pretty certain based on the patterns. Its coming from inside the camera and it is liquid that does not evaporate. On one of my first cleanings, I verified it was clean then took about 100 frames immediately and looked at the sensor (AA filter) again and it had 3 new spots on it.
I do believe the occurrence of the spots is diminishing, though. They do not seem to be as prevalent as when I first noticed them (frequency of recurrence is diminishing).
I don't mind cleaning it and I think the finite amount of Lube will eventually decrease to where the splatter is no longer a problem.