I assume that the bracketology is based on games played and projections for games to be played, so the 2-0 record does not matter much at this point.
Hard to say, but I am going to assume that the projections ESPN used assumes that SLU wins every regular season game except the road games at VCU, George Mason and Dayton. Those games would be so close on a neutral court, hard to say how the ESPN computers quantify the A-10 tournament results.
Edited to clarify by neutral court games, I am referring to the A-10 tournament games.