Hi, KieranWood. A full answer would be laborious. The problem most likely lies in the multilevel list set up for that level. The best explanation of this whole area may be at ShaunaKelly.com, an MS MVP with an excellent site. See this page:
http://www.shaunakelly.com/word/numb...g20072010.html

You shouldn't need to set up the entire list from scratch, but this will guide you to finding the problem.

Best,
Ulo