Relevant info: Project originally started in LP 9. First MIDI added in LP X. Similar issue (OP's second issue, with MIDI) described here:
https://discussions.apple.com/thread/5257076?tstart=0
I MIDI recorded a simple chordprogression using an EXS24 piano. It was meant to be and is the first (and only) track with MIDI on it in this project. No hidden tracks, no Melodyne, no MIDI plugins, all Inspector values "virgin", just some MIDI that seems to be weirdly corrupted...
When I played it back some notes totally misbehaved: in a GMaj7 chord, the constituent B note was replaced by a (awfully dissonant) D# note! But the piano roll clearly shows a B note, not a D#. Even when I muted all notes exept the B note, a B note is heard when clicking the note, but when engaging playback, Logic plays a D#!?!?!?
I tried two different EXS piano's and the EP, they all exhibited this weird transposition of one single note.
It was a project started in LP9. I homogenized the velocities and dead-quantized it so the issue would clearly reveal itself, and it did. The issue is that on playback, some notes within chords are (very) dissonantly transposed, but when clicking those "corrupted" notes in the piano roll, the correct note sounds.
Two questions:
1. Wtf?
2. How to repair this?

