Sub forms displayed at main level

[mcgrco]

Newbie here! I'm trying to set up subforms under a category but they diplay at the same level as the category. Clicking on the category shows the two subforms but I dont want them showing at the top level.

http://www.medicorps.com/mirn/

Also, how do I set up a new forum grouping like the section on this forum eg

News And Announcements

new category

vBulletin Modifications

Many thanks in advance