CPC & Double-dipping?

If you look on the CPC 1st Quarter donations list there are two entries on different dates:

Edward S. Rogers    March 13th, 2008    $1000

Edward S. Rogers    March 25th, 2008    $1000

Hmm, I'd be curious to know whether these entries were the same person or not.

Here is another less suspicious one I noticed:

Frederick H. Mannix   February 5th, 2008   $1000

Frederick P. Mannix    March 17th, 2008      $1000