Dealer says all things being equal...he thinks a cable is stretching and isn't stopping (hence going out of time every 60- 100 shots)
This very well could be the problem , especisly if your strings/cabels are old . I think you are getting a misconception of creep tuneing , and its a vital part of shooting a dual cam bow . With a quality string/cabel a creep tuneded dual cam bow , will stay in tune alot longer than a singel cam bow , so dont let the cam design sway you .
Heres a great link to spot hogs newsletters , they have some great advise
http://www.spot-hogg.com/1_thru_10.htm
Heres a link to some creep tuneing info
http://unofficialatfaq.tripod.com/creep_tuning.htm