Rather than separating them into two tracks, you can:
A. Click the corresponding note number/key in the PRV to select them all and just drag them to the correct note number.
or
B. Use a Drum Map to re-map the events to the correct note number.
but if you really want to move them to another track, you can use the selection technique from option A., and then copy-paste or drag-drop them to another track. Hold Shift to constrain timing when dragging, or if you copy-paste, Tab to the beginning of the first note in the selection to set the Now time before pasting.