thanks for asking.

Correct me, if I'm wrong, but a ' is what you get on your keyboard 
layout when not pressing any modifier keys (alt, shift, ...), isn't it?

So, what Remote Buddy does is to display the "default" key and then 
add the modifiers used during entering via the respective checkboxes. 
Just like you see an "Ctrl + Alt + A" in your menu rather than the 
corresponding character.

The keystroke should still work just fine, though. Don't let the 
display confuse you.

Best regards, 
Felix