Here's a participation trophy.
ok, you asked for it - I’ll start testing on YOU! You have become my troubleshooting notebook.
maybe this will work; just flushed DNS cache
Here's a participation trophy.
As you can see, this one didn't double post. But that's no guarantee that the problem is fixed. I went back through your recent posts and realized that your double posting isn't all that frequent. When it does happen, the intervals between the double posts range from 0 to 4 seconds.
I had two hypotheses about your double posts. First, there's the bad mouse clicker, where your mouse would generate two clicks instead of one. This might explain posts that are 0 or perhaps 1 second apart, but it hardly makes sense for posts that are 4 seconds apart.
My second hypothesis was posting delay. When I double post it's usually because FreeRepublic doesn't do anything when I thought I clicked. After a few seconds I assume I missed the Post button, and I click again. Then it turns out that FreeRepublic (or the internet) was just slow to respond, so I have two posts. This would explain posts that are 3 or more seconds apart, but wouldn't explain posts that happen in the same second -- unless you're unusually impatient.
I don't understand how flushing the DNS cache would help, but so far so good (after one post). Please don't stop posting or even slowing down your posting just because of this minor and infrequent problem. Your posts are too valuable.