The tracks in the photo are open pin, that's the first comparison I would make on your other tracks. Any closed pin tracks you have should be OK and you don't need to worry about them. Open pin will be suspect but they don't all suffer from the pest/rot so you might still be OK. I don't know any way to identify the tracks with the rot, except waiting for them to start doing what yours are doing. Sorry I can't be of more help, but you just have to keep an eye on them and hope for the best.