I wasn't calling you out, I was backing up P10_WRC's comment. Per reddiquette, if you know something is a re-post, but it didn't receive the attention you feel it deserved, you are encouraged to re-submit it.

In P10_WRC's case, all of the submissions before his only had a few votes. Do I think he considered that? No. Based on his comment, he was gloating that his re-post had the most votes. Still, his re-post could be considered technically correct... the best kind of correct.

Now, back to reddiquette and you. I don't care that you re-posted this. I'd never seen it. So, it's all good, from my perspective. I also don't feel you need to use karmadecay, but it's probably in your best interest, if you're going to post to a large subreddit like r/pics. Besides, it's not like this was some huge submission, it has 146 link karam total. Do I think you're a karmawhore? No. Do I think you should put more consideration into submissions to the big reddits? Probably.

Also, even though you've only been on reddit for four months, you likely have a better understanding than I do about submissions, as I rarely submit anything, and when I do it's mostly self.posts to small subreddits. I'm a comment kinda guy--hence, self.posts.

Having said all of that, the biggest offender of reddiquette here is actually sawbutter:

[Don't] Complain about reposts. Just because you have seen it before doesn't mean everyone has. Votes indicate the popularity of a post, so just vote. Keep in mind that linking to previous posts is not automatically a complaint; it is information. Votes indicate how the community values information, so just vote.

TL;DR: it's reddit... we will always find something to bitch about.

[I doubt you wanted this in-depth of an answer; but, I'm a comment kinda guy.]