Well it's not laughably weird, actually. United have more points and better players of course. However there are reasons why we have struggled at Turf Moir recently and cruised at Old Trafford: some teams' style doesn't suit us and others' does. Burnley's sit back/route one/second ball/setpiece gameplan is a problem for us if we are not "at it". United were always going to come out at us which would give us room to play, and that's what happened. Burnley, if they get enough of the ball, can exploit our biggest weakness which is high balls and set pieces. Other factors to consider are form of course, but also relevant is the fact that we played on Wednesday and Burnley didn't.
I'm not saying we are goin g to lose the game of course. But I've been worried about this one for a while now and there's nothing "laughably weird" about that at all.