Problem adding multiple feed from a page

When giving the url to a page containing several feeds rather than a direct feed url one, FeedMyInbox seems to only finding some of them.
For example, if you indicate the http://www.gwmicro.com page as the url adress, FMI only detects 4 or 5 fees whereas there are 9 or ten ones on this page...
I don't know if this is because of the page construction or a bug in the service that's why I'm submitting...