Then Select All and make them Grace Notes. The first one is fine, but the second one still has large noteheads. It only seems to be a problem if you have more than one note in the RestChord.
Strangely, if you copy that to the Clipboard, you get:
This pastes correctly, however, if you try to copy/paste within NWC2, the problem remains.
If you save the file and reopen it, the problem remains.
If you export it as nwctxt and import it, the problem is fixed.
I concur. If I play that clip, the bug notes sound longer than other one.
Confirmed as a bug in NWC2. Thanks.
This will be fixed in the first update to NWC2.