That was difficult to read for many, many reasons. You would have been just fine to open carry in the county courthouse that you specified. I don't really care about the responses that you got because they are irrelevant. It doesn't matter what a cop's opinion is and you sure as hell don't need their permission. The one cop that replied, "That's above our pay grade we only enforce the law", seems very wise to me.
When you put cops on the spot like that, they want to know why you're asking, what your angle is. They might also be thinking about legal liability because they know that it's not their job to disperse legal advice. They're also fallible people with their own (sometimes ignorant opinions). Mix all these reasons together and top it off with the fact that after all of this, whatever they say really doesn't matter--and you get precisely why you shouldn't ask cops legal questions.
Ask around here on the forum. Use the search feature. At the end of the day, look at the KRS yourself and learn what the actual text of the laws are.