I ran the numbers in 2018 and the same patterns were just as prominent, but at smaller scale. A lot of discrepancy between R Governor and R Senator, or D Governor and R Senator, etc. A lot of non-votes too, like a vote for governor with no vote for any senator.
No sauce to add other than this insight. It takes time to do this type of research but these anomalies are everywhere. Certainly, some are valid, but a great many of them do emit a foul odor.