yeah the beacon signal issue was odd?
In theory the two signals could be pinging at the exact same time, but at 457hz that would be hard to imagine. I wonder if they were using a multiple burial feature to block the first signal and it was blocking both? I notice that it can take up to 30 sec for my dsp to separate signals and indicate when multiple beacons are close by.
Frequency drift caused by an older beacon? nice feature on the dsp is that you can check other beacons to ensure they are still operating on 457hz.