I do not know if this is how it was planned but I got a bit confused sort of with the objective when you decide to side with james in the beginning of the mission.

When I got to james he told me about a truck he wanted me to steal and then where miller was. I noticed that I got the task to steal the truck which was assigned and then in my tasks there was also the "Find Miller" task.

I though that since I now know where miller was I would be able to confront him with the truck, but when I got there he was no where in site.

If this was not planned, then maybe you should have it set where the find miller task is not created/assigned until you have entered the truck so in the future people do not get confused.

I mainly got confused because when both tasks were created I figured I could just visit miller (now that I know his location) to confront him instead of stealing the truck.

This bug that I have experienced is not really game breaking since the stealing the truck is automatically assigned, it will just cause those people who think talking to miller without stealing the truck is an optional thing to get sidetracked.