If I access the question "divergent product" (Divergent products.) using the tag gamma-function or using the tag divergent-series I see the same name for the author of the question ("gerben") but one time with 16 rep and one time with 1 rep. Perhaps the unexperienced user has one correct account under his name, and has also stepped in without registration but with the same symbolic name, don't know.
Anyway, the SE-engine seems to step between that user-accounts(?) arbitrarily when you click on the user-names.
Is someone able to look at this? (I didn't want to make a big thing out of this so I did not apply the option of flagging)