Hope ExpertFlyer Voice can answer my questions:

My company has a very good relationship with my travel agent (one of the biggest travel agent in HKG) since we buy a lot of international air tickets every month from them. When I find out the the desired class I want becomes available at expertflyer.com, then I call my travel agent immediately to change to the desired class. However, it happened very often that the numbers of availibility that I saw from expertflyer.com do NOT match with the availibility my travel agent saw from their computers.

For example, when I found that the route DEN-SFO-HKG on UA had at least 9M and 9H at expertflyer.com, then I called my travel agent right away, but they said there wasn't any seats on M or H class, and said they only had 3B (3 seats at B class, nothing with M or H). This makes me feel very frustrated and makes me think that the information on expertflyer.com is not updated. I want to know how often the information gets updated and if the information is live. if the information on seat count is live, then there shouldn't be different from what my TA sees from their network and what I see from expertflyer.com.