I've shared an excel file via dropbox sharing and I saw that the person opened it but they edited it and I'm not seeing their edits. I've shared exactly the same way with others and I'm seeing their edits. He sent me a screenshot and it looks exactly like it should but I still don't see anything. I can see when others are editing though and his never said it was edited, so I have a feeling he's doing it wrong. I asked for the others to help him but he said they all did it together. I'm at a loss for what to tell him, any idea why this may be happening?