Hi Albert Shenker,
With the Q2 SP1, RadListBox no longer can transfer disabled items on the client site, we agreed that this should be the default behavior and we have fixed it. However, the problem still exists if you have the AutoPostBackOnTransfer property set to true. We will fix this for the Q3 release.
Preserving the order works on the client side, however there is still problem on the server side. It turned out that it is not a trivial task to preserve the order when transferring on the server, therefore we decided to provide a KB sample on how to do it. The sample should be available by the end of the week.
All the best,
the Telerik team