All my Logitech mice seem to become unusable after about 2 years because they start making multiple clicks instead of just one.
My newest logitech mouse has started doing this after only 1 year.
This means I sometimes have multiple posts to Twitter. I usually try to delete one of them right away. Sometimes Twitter is smart enough to auto-reject a second identical message. This confused me the first time I saw the special notice "You already posted that." But sometimes Twitter does not catch this, and I have to delete one of the messages.
Today I ended up ordering 3 relays on ebay to repair one of my amplifiers. I'm not sure how it happened but I think it was because of the multiple clicks. I first "deleted" the extra orders but then they came back demanding to be paid anyway. I then "canceled" the extra order. Even after cancelling the orders, they still showed up for a few minutes as needing to be paid. But the second time I tried to cancel it wouldn't let me, telling me I can't cancel something a second time. Then I noticed I had two cancellation emails from ebay. The seller has several days to approve. It had taken me 15 minutes from the original unintended orders to the cancellations so I hope it goes well and doesn't screw up my ebay feedback because I have a lot of items to sell now.