Can Hal Read?

I am a 200 mil league with a hitter's park, and I am actually platooning Sexson and Texiera at 1b. I have Texiera listed as defensive replacement in Manger Strategy, and Sexson has "Remove for Defensive sub with lead" checked. So I get into late innings of the game, and Hal takes out Sexson but replaces him with Belliard, who was at 3rd, and brings Scutaro in to play third, rather than just use Texiera, who was available.
How did this happen?
How did this happen?