Poor integration with DL reservation system
 

I have a mixed NW, KE and DL itinerary booked. The KE segment shows the correct seat number, correct meal and the KE confirmation number. And when I called KE to change the seat the new seat number showed up on nwa.com.

The DL segments show seats "not assigned", "None" for meal service (does DL really serve no food in business on a 14 hour flight?) and no DL confirmation number.

Not a big deal, as I called NW to get the DL confirmation number and checked delta.com to make sure that all is kosher. But it really does look silly and makes you wonder about the IT department.

Same thing happens in reverse as well. Whenever I have a NW flight on a DL itinerary (not codeshares either...), it shows unassigned. I can get the seat assignments on the DL flights fine, but go via nwa.com for the NW flights.