...and, just to make sure, here they are again:
Channel 1A 453.4250 (97.4)
Channel 2A 453.5250 (97.4)
Channel 1B 453.4250 (123.0)
Channel 2B 453.5250 (123.0)
The trip you made took you through two divisions, so make sure all four channels are in your scanner.