I'm surprised I didn't noticed this lol but my explanation for me is this simple, I copied his application post since he was the last post on that thread and forgot to update my segwit btc address coz I wasn't approved on that Signature campaign and didn't bother myself to check. Try to investigate about our accounts if this is any connected, I'm open for any 
It was my mistake lol not a big deal for me That's a very lame excuse (and a very old one at that) - try coming up with something a little more original next time.
Frankly speaking, I had done almost similar mistakes several times. But not with application post, but with bounty reports.
When there is not specific form of report and I'm a bit lazy or in a hurry to search in my last posts for my previous week report, I copy/paste users report, who participate in same campaigns, and replace with my own info from excel table I fill for every campaign I participate. It easy to miss one line with someone's info when you need to replace tweet/retweets/comment/post/facebook share/account links and etc with your own. Easy to miss while copy/pasting and alt+tabbing, and you want to finish with reports faster.
Yes, the excuse is old and lame, but lets not make quick conclusions. If this is a repeated "mistake", then the user is guilty. If based on their posting history they dont look identical, then better make a deeper research and make a verdict.