I just find the numbers strange. That they seem to suggest a sizable number of Republican Primary voters shifted and voted for Critz over Burns? All I know is that these numbers need to be looked at to figure out why Burns didn’t do better given the high profile of the race and the fact this county has consistently went Republican suddenly shifted Democrat? I didn’t check more than this county but it is worth looking into.
The turnout in PA was for the Democratic Senate Primary race. The Republican side was pre-determined and the voters stayed home.
So, you had excited Democrats eager to make their primary vote count and an unmotivated GOP voter since they thought this was a favored Dem district. No reason to go out and vote.
If this was November the results might have been different.
It is called vote fraud.
Without seeing the physical ballot, I can't even begin to guess why the figures you state gave the results they did.