Thanks for the response Dr. Byte,

The mode we are using is Paypal.
The timestamps were all different
Order1:
on Dec. 19th
16:16:59 PST
16:18:19 PST
16:21:13 PST
16:22:31 PST
16:53:06 PST<--the one that actually went thru correctly

Order2:
on Dec. 24th
17:12:30 PST
17:15:32 PST
17:18:13 PST
17:21:17 PST
17:27:38 PST <--the one that actually went thru correctly

As I look at the time stamps more closely I am more apt to believe that it is user error (becoming impatience and hitting the confirm button over and over). The longer delay between the 4th and 5th attempts on both orders seems to indicate this to me. But it's hard to tell.

In addition, I have not been able to replicate this at all. The blank email, well an email with just a single hyphen, seems weird to me. I did not have debug mode on at the time but I turned it on the as of other day (12/27). Also I would not think that this would affect the paypal payments pro module but I also have the Paypal Express module installed.

Thanks,
Chad