Why would you have to have map locations flagged before exploring the area? Or why would exploring first prevent Rob from adding the flags? Seems pretty non-linear to me...
I don't understand the Question. I explored all those areas Long ago Flagging My Own Map Locations as I went. It was only after I joined the Thieves Guild that Rob Marks the Same locations I had Already Flagged. No it didn't Prevent him from "Adding the Red Flag" but just like Iona"s Dungeon,which I had been to much earlier but Apollo did Not appear Until I went to Verdistis and then Back to the Graveyard.
Are You saying that Quests Can't be "Broken"?
There are several doors in the sewers that must be opened by levers from the other side.
Yes,but like Lockpick Telekenisis doesn't appear to throw them down there--at least I have not been able to do it.