you're spot on, i think
Yeah, Oriana new what happend in the first line bcs she had her memories from Vincent's death, and then she died in that timeline, and now Vincent came back with his memories of what Oriana had told him about his "first" death ando that timeline
Basically what we know is the cycle has been going at least three times, 1st Vincent dies, 2nd Oriana dies, 3rd Vincent is the one who remembers everything now. Idk if there are more timelines but for now those are
sorry but im still confusing, means after what Oriana had tried to save him, they apparently died again but this time she died first, then now Vincent have the memory of their memory?