Complicated story (re: infractions)

Hello!
Hubby was on his way towards home with his load, when he saw he was supposed to pull into a weight station...he did!... although he saw the line was long, and he had to pee, so he got out and did so...
The weight station guys were angry about it, and so gave him a ticket, saying it was a "failure to stop"
They also complained his air cables were damaged (they weren't)...
So hubby spoke to his company and they reviewed his dash cam footage, which proved the charges false....
They decided to fight the ticket with a lawyers help....
Hubby paid about $400 in lawyers fee...
Everything seemed ok...
But now the company has charged him $300 extra, saying it's "company policy" to charge this for any infringements
THEY KNOW HE WAS INNOCENT!!! Yet they still want to get away with charging him, and even though they fought the ticket off!
Is this even LEGAL??!!

 

TY so much for replying...
No, hubby is not under any contract from the company...

 

Not the dash cam...hubby took the truck to the company mechanics, to have them looked at after the incident.

 

I think he just hopped out of the truck and stepped to the shoulder?? I'm not sure