This has also happened to me, four times in a row: 2 for completed surveys that are showing as successfully completed, and 2 were one point each for disqualifications (which had been crediting immediately). The earlier of the 2 surveys was Friday, and I'm trying to figure out how long to wait to contact them.
So I don't think this has anything to do with the fact that you have 0 points, because I have over 200. tls