You can assign a collection number "none" to a box set profile (select the profile, press CTRL-P).

From 3.6 on (currently in early beta version state) you also can alter the way a collection item is counted.

Wow! that's what I call a rapid response. And thanks also, it worked a treat!!

Have A Great Day
I Am

SS

There is also another way to do it that a lot of us use.

You can set it up as follows: 
Example #1: If the individual discs in the set each have their own keep case, ie. they are a single title on one disk that has its own UPC, you can number that title, and any others, while leaving the box set cover unnumbered.

Example #2: If the discs in the set are in a digipack, and do NOT have individual UPCs, number the box set cover which has the UPC, but do not number the discs as above.

You can accomplish both ways in the same numbering scheme:  When adding a new title to your database, if the box set is set up as in #1, don't number the outer box set cover by unchecking the box in the profile.  If the set is like #2, leave the box checked.

Now, when you add the new titles to your database, and renumber your collection, check the buttons for "Reassign All Collection Numbers" in the top left corner, and "Title" in the lower right corner and hit Enter.  That will put everything in proper order, with all the both sets numbered based on how they are set up as a box set.

What the programme calls "total dvd number" is actually the number of profiles - which is a different animal altogether. Hence the discrepancy.