When making a custom diagram using building IDs on the link, there's a problem: putting more than 25 buildings on a single link (and thus making it span more than one page) corrupts the order of the buildings on the diagram.
For example, here are the first 25 buildings of a diagram that I was assembling:
http://skyscraperpage.com/diagrams/?...uildingIDorder
But, when adding the remaining 29 buildings, see what happens:
http://skyscraperpage.com/diagrams/?...uildingIDorder
Hope this issue can be solved.