Hi, ok, I don't have too much time to keep trying with older versions of bootstrap to work on ie9.
About the issues, maybe changing the colums to the large version, say instead of col-md-4 we can use col-lg-4 so it resizes better.
I've not touched the header, only made the image responsive if I remember correctly... but I don't know how to fix that. Maybe removing the style, and using a parent 'row' of bootstrap, then using 'col-lg-6' for the image and another 'col-lg-6' for the text and links, so it resizes better. (bootstrap uses a 12 columns system).