I see that thedirector1974
is making the same errors as me.
Here is why.
There is a misleading cue in iC7, when a viseme is selected you make a logical assumption that clicking on a viseme on the lips editor will cause the highlighted viseme to change but it doesn't.
The viseme is changed or added to where the playhead is located and that has got to be changed.
It is anti-intuitive, it causes needless playhead fiddling about to align with the viseme that is already selected or causes a lot of undos.
If this is because of the Auto playhead alignment then that feature should be given an exception to viseme editing. https://www.reallusion.com/FeedBackTracker/Issue/Editing-visemes-needlessly-more-difficult-to-edit-in-iC7-than-in-iC6