You can receive 61.5 by adding a dish and LNB pointed to that slot then do the usual receiver set-up tasks to enable it, but to get any of the local channels on E*12 you will need to "move" again.
Your problem is exactly as we suspected, not an issue with PQ but rather with reception variability. Make sure your current dish is peaked for 129, perhaps sacrificing some signal strength on 110/119 in the process to optimize 129. If that doesn't help, you could consider moving the dish to another location on your property if there are any obstructions, or else installing a larger dish. Search 129 reception problems in these forums for other ideas. Good luck with it...