You might have LNB Drift. If the drift isn't too bad, then things will still work. However, it is possible over time that the drift will get worse and you will lose programming. It would be better to get this problem addressed now instead of being without service a few days while awaiting a tech.
it can...
Ive seen a dp daul w/ lo drift but in that case it tends to be a bad 34 switch. as a tech i just replace everything to help prevent an issue down the road.