Order emaisl being sent to wrong customer

[sanguisdesign]

I have recently installed ZC on a Win Server for the first time:
ver info:
ZC 1.3.02
PHP Version 4.4.1
Mysql api ver 3.23.49
Windows NT WIN8 5.0 build 2195
register globals is on

Here is the really bad thing that is happening intermittently.
A customer (we will call them A) will order something
he will get the proper order info a good email and the CC numbers will got to the right address.
for the next few orders on the site, A will get the order conformations emails for B, C and . as well as the middle digits (omg) of their CC number as this site is set up for manual cc processing.
The data base entries are also wrong, the customer will come up as A but the shipping info will be for B.
If I turn of ZC ability to send emails this stops happening
there are no mods on this install of zc and I cant see why this would happen.

Help required (please)