Is the spool valve leaking again? Also make sure that you understand how the Honda charging system works. There is a low charge and a high charge mode, one that keeps the battery at ~14 volts, another that maintains it at ~12 volts.
Sure is. Honda has a TSB on it, and this happens to basically all VCM-2 vehicles eventually. I believe it is mostly a design defect, as Honda says to avoid the leak returning you must replace the entire upper half of the spool valve including the two gaskets and metal plate.I guess this is so common