Also, Alleyne beat the throw. “Interference” happened while he was already on the base.
Him beating the throw isn’t relevant. The rule was that interference occurred because he was running out of the base path. Had he been between the lines and ran into the 1B, or the fielder had to change his throw? It wouldn’t have mattered. This is really 101 stuff.
NCAA 7-11-p AR 1: "If the batter-runner is running illegally to first base and his being outside the lane alters the throw of a fielder, hinders or alters a fielder’s opportunity to field the throw, or the batter-runner is hit by the throw that has been made in an attempt to make a play, it shall be called interference and the batter-runner is to be called out."