I ran into the same problem both with and without various switches.
The switches I tried (in all combinations) are -r and -a. When using -r it clears the entire list...Using -a adds the information to the end of the list (creating a duplicate entry with no name associated with it), using -ra clears the list, and puts the entry at the top of the list (what I would consider line 1).
As stated, the Edit box for the ID is supposed to be line 0, which is where I want the information put
Maybe try:
did -i forbid 11 0 $did(forbid,2).seltext
Edit:
Nevermind, had to re-read what you said in your original post.
did -c forbid 11 $did(forbid,2).sel -- would check the line in combobox11, according to what was checked in the combobox2
