It sure looks like it's serial vote reversal, since it happened to me twice.
The first time I voted was in the evening of Jan 1 (so it would have already been early on 2 Jan in UTC) and a few hours later those votes were gone. I voted again on the Q and some of the As but now early on 3 Jan (again, in UTC) most of those votes are gone again.
I've asked a general question about serial vote reversal on meta sites on meta.SE, to see if this can be clarified.
Although it wasn't a suggested dup when I asked my question, this has come up before on meta.SE and I even favourited it: The vote fraud script breaks legitimate polling questions - A serial downvoter's lament
The closest thing to an official answer on that earlier question seems to be:
- yes, this is is unwanted side-effect of the serial vote reversal script
- but it doesn't come up often enough for SE to change the script
- if you want to do a poll, don't have just one person post all the possible answers
So in this case, if there's actually a desire to continue with the poll, different people will have to re-post the suggested names and the originals have to be deleted.
Better, since there doesn't seem to be a strong desire to change the name, would probably be to just close the poll question.