I'm not sure why this behavior would be IE specific, but it's worth trying to alter your 'Bubbling' settings in the rule condition as this is where this issue typically stems from. So, you would check this setting in your rule condition under 'Bubbling': 'Don't allow if child element already triggers event'
[img]Screen Shot 2014-05-19 at 8.44.03 AM.png[/img]
If this doesn't work, you may want to submit a client care ticket with additional details like the property / rule name and a URL to test so we can troubleshoot this issue more specifically.
Thanks so much,
Anna