Do you have any compress/combine plugins in yoiur site? If so, try to diable them and clear your server and browser cache.
jvstratum thanks again for your response — as I responded before I'm not an expert. Where can I find whether or not I have compress/combine plugins?
And if not, what else could it be?
Thanks for the response. Not that I'm aware of!
I'm not a super-expert coding person so honestly, don't even know what compress/combine plugins are :-)
The best way to go is to disable your plugins one by one, clearing server cache each time, to find the culprit. Please start with any plugingins that have text in the title like cache, compression or speed related keywords.