A problems with them being B-2 is the response Douglass got from Public Affairs at Whiteman AFB (quoted at the page linked from the OP):
From: GREENE, JENNIFER D GS-07 USAF AFGSC 509 BW/PA
Sent: Tuesday, March 25, 2014 2:00 PM
To: Sweetman, Bill
Cc: COOPER, JOHN M 1st Lt USAF AFGSC 509 BW/PA; GREENE, JENNIFER D GS-07 USAF AFGSC 509 BW/PA
Subject: Aircraft sighting
Sir,
I have spoken with our schedulers and the aircraft you saw was not a B-2 on the date and time in question.
Thank you!
Very Respectfully,
Jennifer Greene
Director of Community Relations
509th Bomb Wing Public Affairs
Now, there might be B-2s operated away from Whiteman (AFFTC is the obvious alternative), but 3 of them?
Maybe the photos are too poor, but I would still have expected to see evidence of a W trailing edge if a B-2.