I was told by one of the network admins that there were many open connections on his switch after the last scan. It looks like the scanner is leaving the connections in a timewait or closewait state which means that one side have not sent a fin packet.
The ports that remained in this status in the switch were 23 and then 194 other ports ranging from 33430 to 63579.
There were no scans occuring when the admin told me about the swithc having open connections to the scanner on those ports.
This can be tied to some Windows script that use WMI.
Please see the following KB Article for a solution:
Hope that helps!