True HD audio track not default??

[timmed]

I just upraded my home theater with a Denon AVR-2310ci receiver and a Denon BDP-1610 Bluray player. I took mostly the defaults after going through the Audessey audio setup. Units are connected via HDMI cables.

I was frustrated because I couldn't get the Matrix to play in Dolby TrueHD, even though the case says it does. Then I tried Underworld-Rise of the Lycans, and wala! It played in TrueHD perfectly the first time. That tells me I had the settings ok.

What I later realized is that you can select the audio track while the DVD is playing (or before it starts) and choose the TrueHD. I guess my question is why it doesn't default to the highest quality audio? The settings bascially say "Auto" for the sound track and video resolution, so maybe it just picks the 1st available track instead of the best one?

Does anyone know of a way to force it to choose TrueHD when available?

Thanks in advance,
Tim