@shagdirty
Sounds like you may be using the Feed to Post add-on. This support forum is for questions related to the FREE CORE version of WP RSS Aggregator ONLY.
For questions related to any of our premium add-ons, be it pre-sales or other, please ONLY contact us via a premium support ticket on this link: http://www.wprssaggregator.com/contact/
However, that’s a great question and one we get frequently regardless of the add-ons, so I’d like to share this answer that applies to all of WP RSS Aggregator.
WP RSS Aggregator does not re-fetch or update an already imported Feed Item.
So if a Feed Item exists on a Feed URL that Item will remain unchanged, unless manually fetched and that Feed Item is no longer available from the Feed Source.