I at least have a similar problem with auto-tuning:
On various (not all) stations, my empeg tunes from the current (perfect reception) frequency of a station to another (almost always near zero reception) frequency of that station. Sometimes that later frequency is actually used by a different station.
Let me explain that last bit, even though it hasn't got much to do with the actual problem: Station A is currently received on frequency Y, but reports other frequencies of that station to be X (located a bit west of the current sender) and Z (located in the east). My empeg tunes to X, but I am on the east side of the current sender, where a sender is sending station B on frequency X.
cu,
sven
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proud owner of MkII 40GB & MkIIa 60GB both lit by God and HiJacked by Lord