Mutiple DVRs and scheduled recordings

I have 2 DVRs (Say A + B) . When I programm A to record a series it appears as scheduled on dvr A fine, but also appears as scheduled on dvr B.  Don't want it to do this  How can I stop it?

Also, occasionly when I am watching a recorded show and press the 30 second forward key the program jumps backward.  Some times as much as 4 minutes,  The only way to get to the end of the show is to watch to the show end (ads included).  This is happening on both DVRs.

Thanks