So what?
There were more than 2 other women with them. Why would they be expected to notice when Adams and Styles left. Styles was asked by Sean Murphy about it and she said that they left no less than a minute after the shooting.
How do you know that they weren't asked? Their positions have all been accounted for. With Dougherty excluded, none were in a position to observe the rear stairs until some time after the shooting.
1) Adams is recorded as seeing people, and none of the other 3 saw each other, means that the piece of data is uncorroborated, taken with her later denials and other testimony of an early descent makes it an outlier.
2) There was only 4 woman in that office, the other people were in other south facing sections of the 4th floor. Garner arrived in time to hear the other girls descend and then see Truly and Baker come up. However T&B didn't see the girls om the stairs, so they must have descended and exited before T&B started up the stairs. If so either Oswald is ahead of the girls and loiters in the 2nd floor lunchroom or sneaks past Garner on the 4th (moving quickly on wooden floor boards)
3) There responses were not recorded, so if they were asked, are you saying the information was suppressed or just counted as unimportant. The positions were accounted for at the time fo the shooting but not in the 2 minutes that followed. The crucial window where any shooter from the 6th would need to descend.