Ajax Toolkit ReorderList Two components with the same id 'componentid' cannot be added to the application

Line 3655 Char 59 Ajax Toolkit ReorderList Two components cannot be added to an application with the same component identifier 'componentid'. When used with a database to update a simple list, it works great until it gets used very quickly by dragging and dropping a few things fast enough. This happens in IE, Firefox and Chrome. It looks like it allows you to create the same identifier, even though it's in the bowls of the Ajax toolkit. Does anyone have an answer - otherwise, I'm off to debug the instrumentation code thoroughly.