I have a 622 connected to my HD, tv1.  Tv2 is an SD set in another room.   The box is in dual mode.  When watching tv1 and the pre-set timer starts recording another show, everything is fine.  The show records, I can watch something else or flip through the channels on tv1.  However, if I turn on tv2 while the 622 is recording I am unable to change channels without stopping the recording.   Is this the way it is supposed to operate?  Do I need to adjust something? I was lead to believe the 622 operates the same as having two boxes.   I believe this situation would not appear with a second box.
				
			 
	 
	 
 
		 
 
		 
 
		