I have received the software update with DTA. I recently noticed that my Premier xl4 only has three tuners available if the mini hasn't gone to screensaver, i.e., was recently being used. When you hit info and scroll down, it says one of the tuners is being used by another TiVo. The tuner apparently WILL become available for a fourth recording, but not for a live tuner on the xl4 if 3 programs are recording. Is this correct? Workaround?