I can't see modwheel changes in playlist anymore

I created a new track yesterday with modwheel changes (CC1) but when I opened this new track today the modwheel changes didn't show up in FL playlist today.
However I can hear the modwheel changes but can't see them anymore.
Where I can find and and look those missing modwheel curves (which should be "transparent", behind those notes in the playlist) ?
Is there some kind of "show all modwheel changes in playlist"-option in somewhere ?

Instead of playing notes with the MIDI controller I just draw modwheel curves with pencil tool.

Other problem is that those modwheel peaks I draw are very low now (I tried to adjust the zoom value option but the modwheel peaks are still very low although yesterday these peaks were much higher ). If I try to draw new higher, very subtle modwheel curves, the orchestral sound becomes wobble

Could you help me ?