Most of the sites allow edits, but I don't think this one does. I'll investigate. Update: if you have a fandom account, you can edit articles. I hope you are able to update Jeb's, which seems to sort of putter out.
As I understand it, Victoria Winters died in 1795 (or 1796, or 1797, depending on the writers) as the result of something done by Jebez Hawkes. I don't think any time traveling happened to undo that. She was supposed to be revealed as Elizabeth's daughter, but near the end of the Adam storyline she was pregnant and left he show. It was really too bad because she was such a beautiful woman and amazing actor.
I'm sure I've seen the Wagner portrait in the drawing room somewhere, but can't find it. I assumed they just bought prints of various famous paintings and framed them—seems like it would cost a lot to have an artist do every single one. I've been puzzling about the one of a woman that hangs in the cottage when Laura is living there (both times) and sometimes is in Collinwood (for instance, in Lady Hampshire's bedroom in 1898). It resembles Mary Shelley, but again I can't find any portrait of her that looks exactly like the one in the series. :)