it will never match 100% while you may start at hour 1 for a long TRT project it will slowly drift out as the ~1 frame/sec difference accumulates. you should not worry it is fine and expected, just make sure start code and TRT matches.
Erik
Erik Freid | MediaSilo, Inc
207 South Street | Third Floor | Boston, MA 02111
t. 617.423.6200, m. 617.306.8632, f. 617.507.8577
http://www.mediaSilo.com erik@mediasilo.com