A few weeks ago, someone reported they were getting duplicate pins using the nIFTTTy share scheduler tool.
I spent a goodly while trying to get to the bottom of it and to reproduce the problem but alas, alak, I couldn't.
Well someone else reported the same issue, quickly followed by another, both in the last couple of days. So I doubled down and tried again. Yaay! 😎 - got it this time.
All fixed now :)