[Plugin: Twitter Friendly Links] Short links sending to incorrect post

I’ve been using Twitter Friendly Links without a problem — so I thought. I noticed today that one of my short links is going to the wrong post. I tested a bunch of links and it seems to be happening 1 out of 10 times or so… no pattern that I can tell.

For example:

https://bstereo.com/iwm

should point to:

https://this.bigstereo.net/2011/01/01/garcon-garcon/

yet it goes to:

https://this.bigstereo.net/2010/06/10/body-language-remix-competition-reminder/

btw, the short link for that url works: https://bstereo.com/hxj

I don’t know if this has been happening all along and I didn’t notice or if a plugin or wordpress update is causing havoc — I’ve tried the usual remedies by turning off and on plugins and trying to get it to work but no such luck.

Anyone have any ideas?