PSR S670 and Garageband 10.2.0

[gayajay]

Hardware setup. iMac running garageband 10.0.2. and Yamaha PSR S670. The PSR is connected to computer via USB port and also have audio outputs running through a XENYX Q802USB.
I'm not recording midi from the PSR. I simply use it as a controller for garageband instruments. But I do have it connected as an external instrument.
The problem that I'm having is that the track settings keep changing. Which ever track the PSR is assigned too, I'll select a different variation of a particular style and it will make changes to that track. For instance, it will cause the volume to dd∂∂ß
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