One thing I’ve never noticed is that in the Al’s Toy Barn scene in Toy Story 2, ALL the Buzzes have Utility Belts! What’s more interesting is that it’s not visible from the front view, it has to be seen at a certain angle. Here’s one such instance:
I thought the belt was being sold separately, as the Buzzes on the shelf were intended to be normal Buzzes (like Andy’s). Since the packaging covers up the belt itself and makes no indication of the addition, it seems the belt wasn’t supposed to show through the packaging.
I’d chalk it up to production of the movie being rushed. They had some of the tightest production schedules of their movies and if I remember right, a number of setbacks. They probably didn’t think it was worth taking the time to design a new box that highlighted the belt and made it clearly visible.