Something tells me that the capturing device itself was operating in full interlaced mode, since that's typical for consumer devices of SD vintage and is indicated by DVCPRO. I highly doubt the capturing device converted film 23.976 to video 29.97 via telecine in this case. Either progressive marked as interlaced or full interlaced video.
If you can send me the sample I'll be glad to lend another set of eyes (and tools). Used to do this for a living.