VPW stp multiplier

[ansoda]

I have noticed on my VPW stp program that the multiplier is taking longer and longer to activate. On a recent session I went 63 hands for the first X rollout. Then it rolled 5 times between 63 and 100 hands. Has anyone else had this happen? When I play this sites stp the X rolls about every 15 hands, and casino machines are about the same. Just trying to find out if its my program or my  poor luck!