Did we do some unbalanced line vs. Bills?

There were a few times vs. the Bills it looked like we lined up with four lineman on one side and two on the other.  Even as at least one of these was a tight end, did we do some unbalanced line to open up holes vs. the Bills or am I mistaken?  Don't tape preseason games, but don't remember this formation too much.  This might be one of the strategies we use to compensate for our lack of talent.  Was curious if y'all noticed the same thing.