Map editing

I just purchased 2 D10 Plus units. My downstairs one mapped perfectly, but the upstairs one made 3 rooms out of my entire upstairs when there are actually 8 rooms. Is there a way to edit this and create the rooms? Or do I need to delete and remap?

If you go to the room editing space (the button with the map + pencil), you should find all the tools required to create and edit rooms. Start with "Room Partition" to create new rooms.