In one ocassion, a friend at work called me because she had a problem with Microsoft Visio , she was trying to draw a process flowchat but using swimlanes, this was not a problem until she realized that it would be better to use vertical swimlanes instead of horizontal ones. But, when she tried to drag a vertical one it just put together to the previous swimlanes created before. To avoid creating a new visio document and lost your work just go to 'Cross-Functional Flowchart' ribbon and select 'Orientation' and 'Vertical'. And it's done, now you can work with vertical swimlanes or if you like it you can turn them back to horizontal ones.
