Audio Delay Issue

[epow0317]

I've been trying to encode a 1080i MPEG2 into a 720p H.264 using both DGIndex and Megui.
But after muxing both video and audio, it turns out to be out of sync.
I guess DGIndex doesn't catch audio delay exactly.
Although i also tried Mediainfo, still out of sync.
Afterall i manually catched audio delay and applied it...

I don't understand why both DGIndex and Mediainfo can't catch audio delay exactly while media player can.
If this situation shows up once more, do i have to fix it manually?

I uploaded the 1080i MPEG2 in case you need more information.
It is Japanese HDTV source.
http://www.megaupload.com/?d=AO8GEUF1

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Mediaplayer plays it smoothly.
DGindex says it has 10ms audio delay.
MediaInfo says it has 24ms audio delay.
But manually, it turns out to be about 100ms audio delay.