Existing categories are getting cut off / removed whenever a user selects a category from the pop up categories selection window.

details:
The categories field is large enough for multiple categories. Lets say the categories field looks like this:
12001 Attendee, 12003 Special Invitation, 13033 this is even longer, Prospect, Seminar Attendee, Superlong event name, 14001 New Years Event

So the user clicks the categories button, the categories selection window pops up, they select another category '14002 next event' and the entire categories field is reduced to (not sure exact point of truncation, but my bet would be at 255 chars)
12001 Attendee, 12003 Special Invitation, 13033 this is even longer, Prospect, Semina 14002 next event

Some issues/questions-
I can not see the underlying code for the categories button to check or increase the field size (guessing 255?)
I can not see/edit the categories popup window.
Is the button code & pop up window 'not able to be edited' because it is an outlook system defined button & form
Or are they not visible or can not be edited because this form was 'borrowed' from bcm back in 2007

Thanks for any guidance you can provide!!

Attached Files

Auction Contact.zip (20.3 KB, 9 views)