Second tag

[Culvers]

That is definitely how the tag goes.
I have never seen a tag like the first picture you posted.
Must have been the previous owner that did that.
The small tag that has the B on it is an assembly line tag.

I have seen some tags like this, but not very often

[ChallengerHK]

  So they are like the broadcast sheet....something that was never supposed to make it to the owners.

Kinda sort. I would phrase that more like "Something the engineers thought that the owners would never have any reason to pay attention to." But then, the engineers thought the cars would last about ten years and get junked. We're all Dr. Frankensteins, bringing the cars back from the brink 

[ragtopdodge]

Could be a fluke, but this guy's 2nd tag is upside down too:

http://cgi.ebay.com/ebaymotors/Plymouth-Cuda-1974-NO-RESERVE-/280721949819?pt=US_Cars_Trucks&hash=item415c55047b

[Jamiez]

If you mount them upside down, then the bottom 2 rows of the tag are visible when you line up the mounting holes, because the holes are towards the top of the tag.