So I just discovered something: Synthmaster comes with an active MIDI out by default. Whatever MIDI you are feeding in to it, it is also feeding back out. I presume this is because you can use it as a controller of some sort. However, this also means that unless you change around your configuration, whatever channel you have selected gets the MIDI fed in to it. So I'm messing around and for some reason my synth is being doubled on the bass channel. Wait, no, now the guitar channel, etc, etc.
:D
Sneaky little program. Just a heads up for the rest of you if you use it, you can find this happening in certain configurations. Just make sure to turn off the MIDI out, if you don't need it. Otherwise, you may get trolled :D.