Playing supposedly bad teams a question..

[George Cantstandya]

Honest question.  Does it seem the Bengals have a have a harder time playing teams that are considered bad and if so why?  A look at the games so far this season:

VS. Vikings (currently 3-4) Win 27-24 in overtime. First game of the season though with limited preseason.
VS. Bears (currently 3-5) Loss 20-17
VS. Steelers  (4-3)  Win 24-10 against a so far decent team.
VS. Jaguars (currently 1-6)  Win 24-21 took a last second field goal.
VS. Packers (currently 7-1) Loss 25-22  The overtime kicking disaster bowl. 
VS. Lions (currently 0-8)  Win 34-11.  Big win but the Lions are super horrible.  They got humiliated by the 3-5 Eagles this week.
VS. Raven (currently 5-2) Win, 41-17 crushed a very good team.  
VS. Jets (currently 2-5) Loss, 34-31 down to the wire.

So as you can see the close games were against teams with losing records with exception to the game against the Packers.  The Bengals are 3-2 against teams with a losing record and two of those wins went down to the wire.   Against teams with a winning record aside from the Packers game the Bengals won by a good margin.  

So my question is if this is just a fluke based on a small sample size or is something else going on here?  Maybe it is parity?  Do you think it is over confidence when going against a team that is projected to lose?  Or maybe a bad game plan and coaching?  Perhaps some mix of both?   I'm interested in what you all think.  Thanks.