There is a browser bug in Internet Explorer 7 related to similar scenario i.e. the change event of the input type file elements is fired a second time on blur. Since the Upload widget is using the change event to track file selection, the file is showing twice in the list. Nevertheless in the case when the multiple option is set to false, I am unable to reproduce it.
As for the second issue, the widget is disabling as expected on my side.
In order to assist further, could you please send me a small isolated example
, which demonstrates the described problems? I am looking forward to hearing from you.
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