This is in fact a bug on our side, I have added it to our internal issue tracker and we will provide a fix for this in the Q3 release that is scheduled for the middle of November.
You can actually fix this issue by modifying the T4 template that you have installed a bit. You just need to locate Specific.ttinclude file and modify it. It is usually located under C:\Program Files (x86)\Telerik\OpenAccess ORM\dsl2010\CodeGenerationTemplates\CSharp\Includes or the respective property files folder for your processor architecture.
In it you have to find the GenerateProperty method and move the GenerateSummary method call a couple of lines to the bottom. I have already done that and attached the new Specific.ttinclude files that you can use.
Thank you for noticing this bug, please find your Telerik points updated.
the Telerik team