Can't get back into wagon for caravan delivery mission

[Threemoons]

Sooo frustrating.   This is like the 3rd time it's happened.  I humped off the wagon to shoot bad guys..or in once case after I was IN THE DELIVERY AREA....and it wouldn't let me get back ON the wagon.  Walked around mashing the triangle button, no luck.  Tried climbing in the back and jumping into seat.  Nothing worked.  This is the third time I'll be ripped off from completing a daily due to this glitch!  Am I doing something wrong?  Help please!  Thanks so much.

[pluck3]

have u tryed to go on your horse ? 

[Plunk_Murray]

It's the other caravan wagon. This happened to me yesterday as I pulled only one wagon in. I got that message and ran around it for five minutes before realizing I was supposed to go back and get the wagon that got left behind. I dragged down the driver's corpse and climbed aboard to finish the mission.