Bob's issue was related to VBSEO URLs. Unfortunately with his VBSEO URLs the count was working properly, the fix was to remove this code from the
more_share_tng template:
Code:
data-url="{vb:raw msot.url}"
This code is located in the twitter code in the template. The counts then worked but the side-effect is depending on the URL a person used to visit the thread, the URL tweeted may vary even for the same thread.