We need to get into the mindset of players being able to float up and down the batting order depending on the situation. Too often with England they'll slot a player in somewhere in the order and he'll stay there, regardless of what score he comes in at.
Buttler came in at 5 for Lancs last night which was ideal for him in the context of the game, however if he'd come in maybe 3 overs later, he wouldn't have had the time to get set.
Incidentally, given the recent talk of a franchise T20 tournament, the Roses match last night was a pointer to what it'd be like. 2 teams based in big cities and fierce rivals, playing in a Test venue which was full with a cracking atmosphere, with a good sprinkling of current England players, some on the fringes and a couple of big name internationals.