PowerLED | High LEDs from a Netduino ethernet control

I'm working on a project where the Arduino should do different things based on different characters (a, b, etc.) being received over Serial. I have gotten it to respond, but I hit a logic error. When I enter a, it does as requested and does the soft-reset procedure (grounding the reset pin through a resistor to reset itself remotely). However, when I do b (or any other of the 30-some other characters, none of which are identical), it does the a command. It should, based on my logic, not do a's code since incomingByte != 'a', but it does = b. Why is it running a and not anything else? Thanks for any help.

P.S. I am aware there are other methods of doing this, which are likely more 'proper,' but I would like to stick with this if/then/elseif logic if possible.

I have attached some of the code below, there's a lot more so I know there might be a missing } there somewhere at the end, but it's there in the code.