DivxToDVD will create 2 different TRACKS. 1 track for each file.
When it reaches track #2, your DVD player will play it, but your DVD counter will reset to 00:00:00
If you wish to have 1 .AVI and 1 track DVD, do like Geno888 said, join both .avi with VirtualDUB, and only then use DivxToDVD.
This is something I have asked to see if future versions of DivxToDVD, since I was one of the ÃŸeta tester for DivxToDVD v2.00
Let's hope someday, all files will endup being 1 TRACK on the DVD, all merged together !