knockout.js - kendo combobox & kendo-knockout dynamic add/remove next available value set -

the issue happens when try set next available value in combobox, here scenario is.

i have list of available items display in combobox, user can select 1 item & assign @ point add list/table, user can remove item selected @ point goes available list.

now issue occurs when following done 1) select & assign couple of items (notice next available item selected in combobox) 2) remove item selected list/table (item should available select in combobox) 3) try select same item & assign again & notice next available value in combobox.

here jsfiddle issue can reproduced (works on chrome) http://jsfiddle.net/navnitmehta/fhxbx/7/

i not sure if issue kendo or kendo-knockout binding.

thanks!