Hired Drivers/Management, New Trucks, Income, Offices, & Related Questions.

[Starflyer]

Sorry, I have read nearly the hole RnR-Question Forum, but I don't find an answer to my questions.

I know how to buy a truck or how to hire a driver.
And i know how to navigate through the map. In 2 weeks i never failed to find my way.

But why are 2 of my 3 drivers doing this crazy things? I've got 4 Trucks. All brandnew, fresh from the factory, with zero miles, and all fully loaded. A Argosy, a Classic, a Atlas and a Venture.
The Venture is my own Truck. And my best driver is driving the Argosy for 2250$/d with 63% loyalty and great income. And the Argosy is crap, like the Sterling 9500. His driveability is terrible.
And i have the good Classic and the wunderful Atlas. Both abolutly fully loaded. But the 2 drivers want 50% more loan, have both a bad income, high costs and low loyalty.
Why?