I think it's a combo of Austin only playing 22 games so far this season and them not wanting to give a 6 seed 3 All Stars. The first one is what it is. As for the second one, I've always hated the idea that the number of All-Stars should correlate with your record. I feel like it's entirely possible to have multiple players performing at extremely high level individually, but the team is just okay because of supporting cast or fit or whatever. Conversely, I hate when they try to find a 3rd All-Star on a team just because they're a high seed.
spurs were bellyaching already about only having wemby as an allstar. whatevs. austin could use the continued chip on the shoulder.
Dearon Fox does have a much better defensive rating than Austin Reaves which might have something to do with it too.