Have two G5 made a CFP NY6 in the same year? No.
Then hasn't precedent been set? Yes.

The CFP ranking system was created with cooperation between the P5 conferences and the major bowls. Contracted bowl tie-ins, TV ratings, and projected revenue dictate matching of the "ranked" (i.e. selected) teams, not necessarily #1 through #12.

It is subjective and arbitrary in nature in order to keep the money "in house"; they make rankings/selections which grow the pie the largest and give the biggest pieces to the P5. Assuming anything else is naive.

We even saw this during the BCS era where G5s BSU & TCU both got in, but played each other. The powers that be didn't want a lowly G5 to beat a P5. Moreover, pitting them together in the same bowl ensured the G5s didn't get the likelihood of higher revenue brought in from playing P5 teams in separate bowls.

Today the CFP system makes sure only one G5 team is ever in a NY6 in any given year. BYU is not P5. BYU is not G5. BYU, by virtue of its independence, is not contractually part of the system. We're now learning this the hard way. The highest ranked bonafide G5 team is in, BYU is out.

Does Barta like BYU? Probably not.
Is he out to get BYU? Not likely.
Do the P5 want BYU to get their P5 money? Absolutely not.