These indexes aren't getting touched - you basically shouldn't bother with index fragmentation unless your index has more than 1000 pages as it'll most probably be entirely contained in cache already and so fragmentation is irrelevant. I thought I'd put that into BOL for DBCC SHOWCONTIG and index_physical_stats but it looks like I didn't.

Checkout this blog post on rebuilds and stats updates - http://www.sqlskills.com/blogs/paul/2008/01/27/SearchEngineQA10RebuildingIndexesAndUpdatingStatistics.aspx. Weird how questions seem to come up in clusters - this week it's index rebuilds.

Hope this helps.