Weird PAL/NTSC message

Just got a brand new Dell Dimension, with built-in DVD burner. I had a bunch of MPEG files from my Sony Cybershot (which is set to NTSC video) that I wanted to transfer over to a playable DVD format.

Here’s what’s weird: I import the file into Sonic and it says that it’s a PAL file, and I have to burn the DVD in PAL format.

So whatever happened, Sonic is convinced these are PAL files.

Any suggestions?