It's possible.
I haven't read the book since around 1997, but I thought they use to advertise the UHF remote for my 2000 to be about 800 feet when not going through walls, but in any case, a couple of hundred feet was not an issue. Likewise, I believe the new UHF PRO remotes have an effective range up to 200 feet.
I am not familar with the 2 remotes that come with the 322, so I can only give you a generic answer.
(1) Change the address for the UHF-PRO remote.
----The IR remote for TV1 should be okay, unless someone is pointing it thru your window.
(2) Change the UHF-PRO channel from A to B, if available on this remote.
----For the 6.3 remote, this is inside the battery compartment.
However, if this only happens when you are entering a channel number, then it may be operator error (your fault). If you take too much time entering numbers, it may jump to a different channel than the one you wanted, and which channel may depend on what channel list you are using and what's available.
Hope this helps, and maybe someone else has more specific info.
EDIT: However, I just realized that you had another post - about adding cable TV with your sat system. I did not read the whole thing, but there may be a possibility that your wiring setup is acting like an antenna, causing your receiver to pick up UHF PRO remote signals from a greater distance. Just a thought.