re: I still am not sure how UVa and Duke are both getting 1 seeds?

That comp is Duke versus UVa, which says nothing about both getting one seeds. Expand your comp, leaving out Kentucky, who is a no-brainer 1-seed.

V. RPI top 25
Duke 6-1
UVa 5-2
Nova 6-1
Wisky 2-2
Zona 3-0

v. RPI top 50
Duke 10-2
UVa 8-2
Nova 11-1
Wisky 8-2
Zona 6-0

v. RPI top 100
Duke 17-3
UVa 15-2
Nova 15-2
Wisky 15-2
Zona 13-2

Considering the fact that Duke is the only team in that group without a conference title, I don't see how you can call them a 1-seed lock. Looking at those breakdowns, Villanova clearly has the best resume, and I'd argue Arizona has the second best. They don't have a lot of top 50 wins, but they are undefeated. And against the top 100, they have the same winning percentage as the other squads.

If Duke were running away on the metrics, I can see giving them a one seed over everyone despite the lack of a title, but I just don't see their resume as being considerably better than anyone else's save Wisconsin (who I just can't justify giving a one seed, which is a shame, because I like them better than any team in this grouping, and they are gonna get the Kentucky screw job).

If Duke wins the ACC tourney, I would give them the 1-seed over UVa, and I can see both of them getting one if both Nova and Zona fall in their tourneys. But right now, I'd still go UK, Nova, Zona, ACC champ.