On UB i am doing much better in the MTT sng with 30 people than I am at the 10 people!!!

I just dont get it!!!! I am now 7 out of 9 in the money with 30 players!!

2 1st
1 2nd
2 3rd
1 4th
1 5th

with 10 players 5 out of 28 in the money.

I can not figure out what is going on!!!! Last week i ended with approx. 47% ITM with a lot of first place finishes on the 10 seated!!!! What is going on??