Editing Theme Options


I have made a few Blog Templates and the new user can choose one at sign-up. Great…

If the new user later decides to change the Theme of his site, the Theme does change, but they can not set any of the Theme Options?

Even options like the choice of Slider images etc…

Is this a restriction imposed by the Blog Template plugin ?

I thought that the newly created site, based on a Blog Template, could be edited by the individual usre as there is no bi-directional connection?

Have I mis-understood this?

Also is there an option to choose a Blog Template at sign-up OR simply choose one of the available Premium Themes?

I would be grateful for any help…