Have you looked at any of the library examples? You don't need the read()s and all those ifs. Isn't it a lot easier just to do something like
if (debouncer1.fell() || debouncer1.rose()) // when switch 1 is pressed or released
{
Serial.write ('w');
}
if (debouncer2.fell() || debouncer2.rose()) // when switch 2 is pressed or released
{
Serial.write ('a');
}