Well put it this way I had a quarter of my hash pointed at the site a few days ago and it was fine, Now since i switched all my power to this pool it's not reporting the amount of work I'm doing on the site, It might say 1.9 2.2 Mh/s in the stats but it's not giving the amount due, I know because I have a good idea of what it should be getting after watching my rig 24 7 (stuck in my room at the moment) I have a good idea of what to expect.
What I have seen is that PoolWaffle has changed things because of the big rig, Seems to have shagged our profitability.
it takes time for you to get to "steady state"
as in reach your equilibrium point where you are carrying a steady number of unexchanged and then more regular exchanging.
wait a day for things to equalize out.