We have two reported items related to the Deals feed that we are investigating and working on addressing:
1) The feed does not validate causing issues using it in Feedburner and other tools
2) The "Offset" filter is intermittently not returning expected results - fewer items than the offset number even if there are more than that number available to show.
The Product team is currently looking into both of these items. We will post updates when we have more information to share.