Strong signals can be found in much simpler ways, but that is not really interesting since they could be received easily just by use of more bandwidth.
The maximum frequency shift, allowed for in the search procedure is 150Hz/minute by default. The parameter can be increased, but the maximum value is 1000Hz/minute. At 08.23 the frequency drift is smaller than 1000Hz/minute and the SM5FRH as well as SM5DCX and SM0FFS are easily locked to. SM5DCX is at 5800Hz and the doppler shifted echo is at 11300Hz. Note that the signal is much weaker than many of the EME signals! SM0FFS is at 16000Hz with the doppler shifted signal at about 21500Hz.
SM5FRH, SM5DCX and SM0FFS are all extremely easy to copy when locked to. The signal at about 5100Hz moves faster than 1kHz/minute and can not be locked to. This may be a DX station with a different geometry and different doppler shift.
Fig 1. Locking the AFC to a signal with rapidly changing doppler shift. At the time when the processing was stopped, the signal is at 7150Hz. The green cursor in the high resolution graph shows where the signal is (supposed to be). The High resolution graph uses a large number to average over so the start of the event at 7740Hz is still in the average. The EME signal at 7475Hz which is nearly invisible in the waterfall graph is very easy to see in the high resolution graph due to the long integration time.