First, if your links work, I wouldn't worry about it.
Second, most likely it is the XML-Sitemaps.com problem. Because all the links you posted were to maps, that may be the problem. Suggest you contact XML-Sitemaps.com and see what they say. Maybe the program is having a hard time figuring out map links.
Cowboy
If it ain't broke... fix it until it is!
If you have never seen Our USMC Silent Drill Team, you need to watch it here in a one of my Shozam galleries: http://www.ohiowebs.net/usmc