when i scan for channels with an ota tuner, i get the channel numbers in a sequential order.( 1,2,3,4,5 etc) these are not the actual channel number. ive tried changing them to a normal number for my area. scanned channel 1 might = 2.1 or channel 7 might equal 23.2. i can change them on the one window but when i close the window they revert back to the scanned number. is this normal? this has no internet connection and is being used for ota recording.