I am developing an application in which I need to get all the activity after some particular time say T. I am using timeline api in the following way:

URL-1 https://api.stackexchange.com/questions/20032212/timeline?fromdate=1384705610&site=stackoverflow.com

fromdate:1384705610
site:stackoverflow.com

URL-2 https://api.stackexchange.com/questions/20032212/timeline?fromdate=1384700712&site=stackoverflow.coml

fromdate:1384700712
site:stackoverflow.com

In response of Request2, I am getting a comment with creation_date as 1384705710 which obviously is greater than fromdate i.e 1384705610 in Request1. If I understand correctly, I should have got this comment in response of Request1 as well.

Can somebody put some light on this behavior ?

And What is the best way to get question activity after certain time T ?