Delta SkyMiles - SeatGuru behind on updates?

For the third time, I have emailed SeatGuru about some of the Delta seating configurations, specifically about SeatGuru's 757-300 Versions 2 and 3 maps, which do not exist as actual configurations. Still, SeatGuru has them listed. It has been three months now, and SeatGuru has done absolutely nothing about them.

Also, I emailed the new MD-90 configuration to SeatGuru today, and I hope that it gets posted soon.

Is there any reason why SeatGuru has been so behind on updates with Delta's seating configurations?

I've noticed that too, maybe just a general lack of concern at seatguru?