I've had this problem with a previous pair of strands where the sole stitching wears through on the bottom of the shoe and the sole seems to separate from the shoe. This is currently happening on my players:
I've had 3 pairs of AE, the previous pair that did this was returned to Nordstrom (this problem started happening after about 4 months) and this pair shown is about 15 months old. I wear them at most once a week. I'm not hard on them. They are in trees when not on my foot. Is this unacceptable? Shouldn't there be glue there to hold them together? I talked to Nordstrom and they agree with me and they said if they don't want me to have them try and fix them that I can return them. Furthermore, I've seen several people that have all the stitching worn off on the bottom and this doesn't happen to them. I'm not in harsh weather (live in southern california) and they are mainly worn indoors.