Hello Roxana Cocariu,
At the moment there is no straightforward way to constraint the movement of the carousel and we will consider introducing new API that will allow the users to fine-tune the carousel movement. Nevertheless I have prepared a sample project that demonstrates how to constraint the carousel movement. The project also demonstrates how you can get access to the top most item of the carousel which might eliminate the need to have selected item at all times.
Thank you very much for the valuable feedback. I have updated your Telerik points.
the Telerik team