Glad you got it worked out :goodjob:
My brake pedal is a bit low and squishy compared to most cars I've driven in the past (including the other Hondas) so maybe it's just the car or maybe it's that I, like you, have really old calipers in the rear (and in the front in my case).
I've done the various tests on mine as well and all seems to perform properly. Flushing the fluid did help, but the pedal still has a bit of travel before you really begin to brake. I thought for sure that putting new pads on front and rear would help but it didn't, though sometimes the pedal seems a bit lower than others :dunno: