hi Sarah_digilife,
Manifold uses a “custodial” marketplace contract for its listings, meaning that the token(s) you list for sale are transferred to the marketplace contract for the duration of the sale (lyndo explains it better here: Gallery App and Fiat "Buy it Now" - #2 by lyndo ). the address in the transaction shows that initial transfer to this address: 0x3A3548e060Be10c2614d0a4Cb0c03CC9093fD799 , which is Manifold’s marketplace contract address.
this is the expected behaviour, as warned as part of the listing creation process (albeit lower on the page):
as you are the creator of the listing, you can manage it through the Marketplace Studio app.
hope this clarifies the process for you, and don’t hesitate to ask more questions!