May someone explain this to me

So, I was working on my organ, so that it is easier to play, and I was working with if else statements. After a couple of if else statements, the code stopped working--I mean the program would not execute what was in the bottom if else statements. I then put an if on one of the statements where it was failing to execute, and maintained the other if else statements as if else statements, and band, the code worked. This is beyond my understanding really? Does anyone know why? Is it because ChucK can only accept a certain amount  of if-else statements? Is that even feasible? Is there a limit to cases you can have?

Confused