Can't Move Automation Changes

I can no longer create or move volume automation track changes to anywhere except at 0%, 25%, 50%, or 75% of the way through a measure, which is not enough granularity to make the volume changes I want to make. I didn’t start experiencing this until after I upgraded from Cubase 6 to Cubase 8. My existing changes are at arbitrary points in time, but I cannot move them or create new ones where I want them. Loading the project back into Cumase 6 did not help. I would not be able to recreate what is already in my automation track if I were to start over with this strange limitation I have not experienced before. I just don’t know what changed, as all I have done is record some new vocal tracks, which now I cannot mix properly.

Any help would be so greatly appreciated.