Too many people join the pool and quit after a short time because they don't think they are getting what they are "suppose" to be getting.  Take a look at the bigger picture.  @ 370Kh, you should see ~ 150 coins per day.  The pool, on average hits a block every 4 minutes.  With 1440 minutes in a day, that would mean the pool should hit 360 blocks per day considering the difficulty does not change or the pool does not have an outage of some sort.  Once you were running at speed for a a while you were consistently getting .13 per block.  

So, 360 blocks x .13 = 43.2  So, looking at that most people would would instantly jump to the conclusion that the pool operator must be ripping you off.  Well, the server shows you have 171% stales.  That's right, 171.23%!  So, roughly, you are loosing out on 2/3 of your coins per day.  The last 1/3 is what you see in your account.  An estimated 150 per day with that high of a stale rate only nets you 49.5 coins.  Then subtract the pools 1% fee and your at 49 coins per day.  On top all that, the pool may have some bad luck and not hit 360 blocks.