I reported this issue during beta testing and couldn't find it here, sorry if this is a repeat.
Ancesty allows clips/saved pages/articles found in Newspapers.com and Fold3 databases to be "saved to Ancestry". When saved they each create a fact in Ancestry with the URL back to the item and a linked source citation record.
When these items are added to RM from Ancestry in TreeShare they get added individually to the list of FACT TYPES and appear in the "field" list for use in reports, resulting in hundreds of useless fact types that clutter up the field list.
TreeShare should recognize facts and sources from Newspapers.com and Fold3 and create general fact types of "Newspapers.com" or "Fold3" or maybe "Ancestry external source" rather than a unique fact type for each fact. I think this will also happen with Find A Grave.