Reservations at DL Oga's are still only 14 days. Rumor is that was going to be extended but as of today it is only 14 days out.
Hmm... I checked earlier prior to my post and the calendar was not grayed out for the first 45 days. However, just now when I tried booking random days and times for a party of 2 about a month out, no tables were available. Maybe, they're in the process of rolling it out to 45 days soon.