Once again...
It's clearly NOTHING to do with WHDLoad using the wrong kickstart. It's GameBase telling WinUAE which kickstart to use.
If WHDLoad can't find the correct kickstart it pops up a message saying so, it does not load a lesser version of workbench.
In this case above you can see it's clearly WinUAE/GameBase getting it wrong as he can proceed to load the game from a different Kickstart and it runs fine.