WTF, BLUE??!!! the highest my ammonia read was very dark green (which was an 8ppm ammonia spike in a cycling tank)
Blue does not sound valid at all.
Symptoms from high ammonia include "blinking" of the eyes frequently, and the fish gravitating towards the water surface to gasp for air. also clamped fins and lethargic fish are another indicator.
doing too many water changes wont harm them at all
(unless its every hour 24/7 lol)
You're actually making their water even more clean if the test kit is wrong lol.