Right - the following is my understanding, so correct me if I'm wrong -
EB was with RB in Col/Dan park until 2:00 am or so on 19 June 1990 - doing what two students, or recent graduates do that are still living with their parents.
At 10:00 am on 19 June 1990, sister of EB reports she is still wearing the same clothes as when EB left evening or whatever time on 18 June. This insinuates EB did not change into any pj's or possibly not get any sleep after she came home at 2:00 am or so.
So EB finally changes clothes, goes to the campus, again, to 'check some papers', according to family, and brings home milk. This is about 11:30 am or sooner?
Then EB left for a jog - again to the campus or surrounding area, in her car, and again according to family, between 1:00 and 2:00 pm, wearing shorts. Does that mean she wasn't wearing shorts when she went to the campus previously and for milk? Then she returns about 2:00 or 3:00 pm.
Then EB wants to go back to campus, again, and check the tennis schedule, according to family, about 4:00 - 4:30 pm. She is now wearing black pants and a white blouse with a floral pattern.
EB has changed her clothes, according to family, at least twice between 10:00 am and 4:00 - 4:30 pm. But didn't change clothes between 2:00 am and 10:00 am?
Hopefully no one minds that I not buy into that. I don't get the not changing between 2:00 am and 10:00 am, then changing twice later in the morning/afternoon in a short period of time. Bear in mind, that's just me, but have had a university student live here - female at that. Cosy pj's at 2:00 am was the dress code. And as I recall, my dress code was the same years earlier at 2:00 am unless I had not arrived home yet. Even a guy will peel down to boxers or whatever and lose the jeans, shirt/t-shirt from the night before. Jmo.