A couple of things you might try to troubleshoot -- grab the secondary data source that is populating your control and drag it onto your form someplace, so you have a repeating table or section that shows everything from your list. Preview, and see how many records are in the data source.
If you are still getting only 6, you might want to try creating a new template, just adding the data connection to the list, and again adding a repeating control bound to the repeating group from that data source and preview.
The only reason I know of that you wouldn't be getting all your records is if your default view wasn't showing all of them, and it sounds like you've already addressed that....