How would the TWR be able to offer a reliable 1000' wind?
The problem has always being around, Hobart is a classic case, you can have a tailwind of 15 - 20 knots at 1000' and then descend into the sea breeze with a head wind of 15 kts landing RW12.
Perhaps the other night's experience in DN may have had contributing factors, tailwind, ref + etc.