The only source I have seen on Ancestry for Thomas Ricketts is a Civil War pension that names his wife Ellen. Her maiden name is not listed.
The only marriage record for an Anthony Ricketts and Ellen Hand was on Ancestry. It is unreliable, it was created from group sheets and users trees.
The US and International Marriage Records are from Ancestry and are not actual records. Those are the marriage records they create from group sheets and users trees. There are some listed under sources on that profile.
On Ancestry you need to check the source to see where it originally came from.
I would trust the FamilySearch record it actually came from Maryland's Baptism's and Christening's Microfilm.