Not that it's a big deal, but there was an "audit" of sorts done late last week and over the weekend, reviewing registered members, star voting etc, and it was determined there were a few "phantom accounts" who were doing multiple voting both good and bad, and maybe even for the their primary alias too IMO, so admin cleaned it up.
If you saw your vote count drop and score change either way, this is the generic answer as to why.
If you have further questions, I cannot answer them, ask admin.