Make sure the TV input is set correctly for every activity that it appears in (or make sure it's not included if it's not supposed to be). There are options in the TV input settings about whether the TV goes to the same input when it's powered on or if it goes to the last input selected. Re-run the input setup and answer all of those questions correctly. If everything appears to be setup correctly but it still screws up, try increasing the inter-device delay for the TV.