confirming loss of sorting; lack of template/host dropdown might be because custom graph already has an item from a template added. in that case further items can only be added from the same template.
edit : usability issue - it would be better to show the dropdowns, but disable them, and ideally - show a tooltip explaining why other templates/hosts can't be chosen
svn://svn.zabbix.com/branches/dev/ZBX-2548
confirming the fix for sorting. if the first item has been chosen from template, now the host dropdown is visible and disabled (but without a tooltip)
suggested text for tooltip :
"This graph already has items from a template. Further items can only be added from the same template."
ok, it's not perfect, but we can improve it later 
tooltip works in dev branch rev 12760 with opera & konqueror, but not with firefox -> considering that to be a browser specific problem, good to merge
Bug fixed in version pre 1.8.3 revision 12763
Made selected host shown not only for items but for any popup if host selection is not allowed.