The Combo box data(nearly 100) are loaded from a json file. After Loading, the last value set is queried from DB and is set in the combo box. Now, if the combo box is clicked, why the combo box doesn't show the DB value as highlighted in the listed values ? This is a major bug in ExtJS I guess...
When a DB value say 50th item was set, this value was not shown as Highlighted or doesn't scroll near to the 50th item list in the First click of the combo-box(when the value is again to be changed). If the Combo-box is clicked again, the item is shown as highlighted and it is scrolled to the 50th item in the list....
The data was set first and the set of values(100) were loading. But now, after the list of values was loaded the previous was set and now works like charm !