My Pioneer Pioneer AVIC-X920BT DVD/NAV/AV unit (with Pioneer GEX-P920XM XM Satellite Radio) is losing my XM radio presets. This started approximately two or three weeks ago. Since then I have had to manually add the XM stations back to my preset list a few times, only to lose those settings again. Sometimes the presets will remain a few days, sometimes just a day or two. I’ve also noticed that my Passport 9500IX will not come on when I turn on the ignition (set to come on with the ignition), but sometimes it will. I’m just wondering now if the Pioneer and/or Passport aren’t connected to consta