I have 22000 miles on the truck. I have put that on in one year. Is there a certain mileage that I should have the fluid changed? I really think it is more of an air issue.That is the effect that can be felt if the brake fluid has absorbed too much water from the air ( in Honda's the brakes are not sealed and can absorb water from the air - that is why Honda says to replace the brake fluid every 3 years ).
The other reason is air in the brake line and bleeding the brakes will fix that.
If you press and hold the brake pedal and it does not move - there is nothing wrong with the brakes - it is the brake fluid - either it has air or moisture in the brake fluid.
Air and moisture does compress which is why a second pedal seems stronger - you have compressed the air or water and got more brake fluid in the lines now.