1) Try disconnecting both lines from your receiver and do a check switch and save results, then reconnect and do another checkswitch and save results, if this doesn't help then,
2) Try bypassing the switch and connect directly to the lnb by using two for-81 barrel connectors. If you connect both tuners to either lnb you will only get that satellite either 91 or 82 and do a check switch and save the fewer satellites than before. The receiver will reboot and load those channels received. Make sure the inserter is no longer connected.
91 has mostly SD channels 82 Has mostly HD channels. If this works then it probably isn't the receiver, and you will have to troubleshoot to see if it is the inserter or the switch.
If Life is a Highway,...then why is there no end to this dirtroad?