Doctor Who: Evacuation Earth Puzzle Solution?

I've found this puzzle on Doctor Who: Evacuation Earth and I can NOT seem to solve it.

If I were to follow this exactly, I'd get this:

8:00-10:00 Mary
10:00-12:00 Alistair
12:00-14:00 Sam
14:00-16:00 Bob
16:00-18:00 Katy

This solution would be wrong because Alistair works AFTER Sam and not before.

How do I solve this puzzle?

EDIT: Tried Mary, Bob, Sam, Alistair, Katy. Didn't work.
Tried Bob, Mary, Katy, Sam, Alistair. Didn't work.
Tried Mary, Bob, Katy, Sam, Alistair. Didn't work.
So I've basically tried every correct solution, and none of them work.

 

No idea. Have you tried Googling it?

 

Yeah. Apparently, this puzzle was created by a dumbass. It has no solution, I'm the only person with this problem, and the "hints" that HAVE to be followed make the puzzle automatically wrong. I can't find any cheat codes to make this puzzle auto-solved, either.

 

Did you try switching bob and katy with each other?

So its:

8:00-10:00 Mary
10:00-12:00 Alistair
12:00-14:00 Sam
14:00-16:00 katy
16:00-18:00 bob

 

Katy has to work after Bob. So no, I didn't try that.

 

mary
bob
sam
allister
katy?

 

Tried it, didn't work.

 

This is old, but guess what: Mary, Alistair, Sam, Bob, Katy

It's wrong, but it's right. I guess they forgot to change one of the clues... And "works after" can only ever mean "works immediately after," right!?! As if.

The game is so poorly made. So many bad puzzles, arrows don't work, cursor moves, etc. Even if the controls are bad and it's like a used Prof. Layton on easy sauce, I'm determined to finish it...