Unfortunately the ordering of Page Templates is not possible to be controlled by user specified terms. Custom page templates are ordered alphabetically with precedence of numbers under the template of 1 Column, Header, Footer.
Thank you for your feature requests I have added them to the release in Q2 around 25.07.2011 and we will be working for providing the required functionality.
The bug fix you require will not bother you with the introduction of the sorting functions.
the Telerik team
Do you want to have your say in the Sitefinity development roadmap? Do you want to know when a feature you requested is added or when a bug fixed? Explore the Telerik Public Issue Tracking
system and vote to affect the priority of the items