Yeah, I just rewatched too. I think the misleading thing was “something new, to go with something borrowed.” That, combined with the fact that she draws it out of the air behind the dress, probably put the suggestion in our minds that she made it.
And there’s also the timeline issue of how did it get into Gerda’s stuff if they were on the mission to get it when they died. But I -think- that we’re going to find that was a thing that happened before their death somehow.
Keeper of Belle's Gold magic, sand dollar, cloaks, purple FTL outfit, spell scroll, library key, copy of Romeo and Juliet, and cry-muffling pillow, Rumple's doll, overcoat, and strength, and The Timeline. My spreadsheet: https://drive.google.com/file/d/0B6r8CySCCWd9R0RUNm4xR3RhMEU/view?usp=sharing