IE10 is inconsistent with other browsers as it shows the 'delete' button on the right while typing in the autosuggest. The expected behaviour is that the button is only shown when an actual selection has been made, not while typing. I can reproduce this consistently on the demo on your website and attached some screenshots as a reference.
Demo on autosuggest website in IE10:
Our implementation in IE10:
How other browsers show this (no delete button on the right):
IE10 is inconsistent with other browsers as it shows the 'delete' button on the right while typing in the autosuggest. The expected behaviour is that the button is only shown when an actual selection has been made, not while typing. I can reproduce this consistently on the demo on your website and attached some screenshots as a reference.
Demo on autosuggest website in IE10:
Our implementation in IE10:
How other browsers show this (no delete button on the right):