sorry so long I just wanted to give all info from the get go to make it easier for all...also this might be only strange to me possibly...but

I am taking a few of my two part mpegs and merging them with tmpgenc. so I can burn to dvd and not have to load 2 seperate cds) The first two movies I did worked fine...the third...audio sync problems once it goes to the second part. (I tried using DVtool and it simply freezes once it gets to the 2nd part.)
I tried to see if possibly I was using the wrong thing to merge them so I tried every selection in tmpgenc...same thing...
I tried to convert the files with tmpgenc (assuming I might have 1 file different from the other..) the files are unsupported and I tried raising the vfapi priority and I have downloaded all codecs to no avail.
Any help would be greatly appreciated and as you see I DID try many avenues and read guides before posting this. Here is the file info for both when I load it with avi codec (same for both files)

File : 804 MB (0.0 B), duration 0:00:00, type MPG, 1 audio stream(s), quality 88 %
Video : 0.0 B, 2450 Kbps, 29.970 fps, res. 480*480 (16:9), MPG2 = MPEG 2 (SVCD/DVD), Supported
Audio : 0.0 B, 224 Kbps, 44100 Hz, 2 chan., 0x51 = Mpeg-1 audio Layer 2 [0xc0], Supported