Hard to say whether this is a typo or bad grammar but, either way, I was very excited (and admittedly surprised) to see the preposition leading and then suitably disappointed to find the additional preposition at the end.
Saw this at my son’s swim meet and my wife noticed not one but two agreement problems.
Saw this on Medium (apparently via Twitter; and, yes, I realize that Medium is a Twitter offshoot) and found it more amusing than expected. Also, moved the apostrophe. The apostrophe in the comic isn’t wrong; I just find it easier to imagine plural proofreaders than a lone proofreader (although therein might lie some of the humor…).
I include, and enjoy, this one because it is not a traditional typo, in that it is more than a simple missing of a mistake. It is a missing of a mistake that requires some background knowledge, albeit some basic background knowledge. Whether ‘Twitter account’ should read ‘hashtag’, or whether the #whoareyouwearing should read @whoareyouwearing, the association of a Twitter account (rather than hashtag) with the hashtag #whoareyouwearing is incorrect.