It's always selecting the first item when the filter is set to "contains" Also, consider chaning the default filtering to "contains" like jQuery's AutoComplete UI control :) The others just don't work
This is a known issue. Currently, you cannot enter a custom value, which is part of the highlighted item. We will fix that. By default filtering of the combobox is not turned on. If more users thinks that the default filter should be other we will modify it