Not sure what your question is.
37 miles is within normal range in the winter time.
The range estimate on the display is just that, and will vary based on recent driving history, using more heat and/or driving at higher speeds will reduce the available range. It is possible they did a software update when they replaced the failed computer as there is one that does change the way the PHEV calculates range (I believe for both gas and electric use?).
As a note, if you are truly driving regularly in HV Charge mode, that is by far the least efficient way to use the Clarity PHEV. I drive the BEV version, but others with PHEV experience generally recommend switching to HV mode (not HV Charge) when on the freeway and/or to preserve the EV miles gained from plugging in for lower speeds or city type driving. If your trips are within the pure EV range, that is the mode you should stay in.
Oregon Electric Vehicle Association Vice Chair
NDEW City Captain