Negative number in # Open Files

I have a server 2008 standard and in the Management Console under Sessions, I have a session that has a negative number in the “# Open Files” column. Example, it says “-10”. I’ve searched everywhere to no avail. I have the same mapped drives on 12 workstations and all were initially configured the same with the same software, yet this one machine in particular (Office3) will have a negative number as indicated above. We are using Dentrix G4 as a practice management software and we have similar networks configured the same way without any issues. Any ideas what this is indicating and if it is posing any problems?