He's paying back the money you paid Ruby, not the toll...
(Yes, the writing got me confused for a bit there too, but there's no bug there)
It used to be 150 in an older version, they changed it to 2050 after that (probably since 150 in that stage is peanuts. So is 2050, but still...), but apparently forgot to also modify the PC's response entry. So yes, that is a bug
