No worries. That could certainly explain what you saw.
By the way, if you want to generate a Code First model database and you have the possibility of using our latest release, you can skip the creation of the EDMX file using the new "Reverse engineer into Code First" functionality built into the EF Designer. There is more information and a walkthrough here:
http://msdn.microsoft.com/en-us/data/jj200620
Hope this helps,
Diego
By the way, if you want to generate a Code First model database and you have the possibility of using our latest release, you can skip the creation of the EDMX file using the new "Reverse engineer into Code First" functionality built into the EF Designer. There is more information and a walkthrough here:
http://msdn.microsoft.com/en-us/data/jj200620
Hope this helps,
Diego