Is there a sensitivity setting for the MX850. I just got it and have it set up to control a couple HR20-700 dvrs. I use rf and it seems that the buttons send multiple commands(ie; press "FF" and it skips to x2, x3 or x4 while holding the button down) no matter how careful I am with pressing the buttons. I've tried putting the tape w/hole over the ir detector since some say that it can be overloaded but that didn't help. The mrf250 receiver is about 12ft away and you can see the unit so I don't think it is a bad rf signal. When I use the manufacturer remote (RC34) I don't have the problem? Would appreciate any assistance. Thanks