Check what I just read:
Internet Explorer CSS loading
Internet Explorer has a 32 CSS file loading limit, which isn’t that hard to reach if you use many plugins/extensions. If your website looks okey on Chrome and Firefox, but the template is messed up on IE, then this could be the problem. In this case google “css combiner” + “Joomla” or “WordPress”, and you will probably find a plugin, that will make only one css file from the others.
Might be the case? It looks exactly like my issue; do you know something about css combine plugin?
Thanks!