Table of Contents problem

[BRG]

I'm preparing a long book-length manuscript using OOo Writer, and the table of contents has some weird problems. While most of the entries look just fine, with the entry left-justified, the list of page numbers right-justified, and a row of dots between, a few are formatted differently: the page list is not right-justified, and there is no row of dots. I just recently switched computers, from one running Windows Vista to one with Windows 7, if this helps. Can anyone figure out what is going on, and how to fix this?
_________________
Running OpenOffice.org v. 3.3.0 under Windows 7 Home Premium

[BRG]

I'm sorry. I said table of contents. I meant the index. But the problem is still there.
_________________
Running OpenOffice.org v. 3.3.0 under Windows 7 Home Premium