Do you want to try PPK? Something you could do if you want to try RTKPost is to correct each rover log to your Emlid base using the same coordinate for the base station each time in RTKPost.
You could PPK base on day 1 and derive accurate absolute coordinate. Correct rover log to emlid base with this corrected base coordinate. For day 2 correct the rover log to the emlid base using the exact same coordinate as day before. Use this tool to make life easier:
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Alternatively, how were you receiving corrections to rover, LoRa? Were you by chance logging the RTCM3 message in the logging tab? Base coordinate of each surey should be buried in there…