These receivers are dumb when it comes to which satellite they are receiving. For example I can put my dish at 105W, but go into the receiver on Galaxy 19 and tell it to scan. It will happily scan in the channels off of
105W, but it will show the channels as G19 in the receiver. So somehow you have inadvertently scan some channels in with it set to AMC21, when in fact you were not pointed at 125W.
OR, the receiver came with preinstalled transponders for different sats and you have some that are on both birds. However, no you are not getting 125W while pointed at 97W.