Here's another example of the synch problem that been there since version 7 when importing windows media center WTV files. The longer your source file is, the further out of synch the audio gets after import.
Windows DVD maker uses the same source files and produces a proper DVD.
In PD8, the audio is already out of synch immediately after importing, so there's no point in bothering with even trying to produce anything. Nothing's been improved since early version 7.
Win8 64-bit Pro Retail
Intel i7-4770
16GB DDR3 1600 8-8-8-24
MSI Z87-G45 Motherboard
ASUS GTX 660 Direct CU II OC 2GB GPU
1 TB RAID 1 (mirrored) Drive Array
Several scratch drives for video, TMP, pagefile.