The SSMS designers always run things with timeouts.
A general best practice for is: Don't let the SSMS designers actually do things like that for you. Instead use the SSMS designers to generate a TSQL script and run that in a query window.
The object creation dialogs all have a "Script" button, so when you're done configuring the designer, script the creation and run it in a query window.
David
David http://blogs.msdn.com/b/dbrowne/