Rewinding Live TV on Whole House 8742HDC DVR and 4642DHC Client

We recently had the whole house DVR system (Explorer 8742HDC and Explorer 4642HDC clients) installed.  The default setting prohibited rewinding live TV, but I changed the setting to enable pausing live TV.  But then I noticed that you can't rewind live TV like we cold on the old Explorer 8300HD DVRs unless you first press pause.  After you press pause, then rewind and fast forward are operable, but only back to the point that you originally hit pause. (However, sometimes I can't even do that and I get a message that says something about having technical difficulties and to try it again later.)

This doesn't seem very optimal.  The reason I want to rewind is to see something again.  If I want to see something again and then I hit pause (so that I can rewind), I can't rewind to the video I want to see again because I can only rewind to the point that I first hit pause.  So the only recourse is to hit pause whenever I first start watching TV and whenever I switch channels.  This isn't good.

Any suggestions?