I've found a similar thing, without wishing to be patronising. Its a big shock to the customers who would come to my checkout if they asked where I was at uni...
Anyway, after the managers found out that I was actually fairly competant and actually put effort into the job I ended up being given some little responsibility. But they were still rubbish, basically glorified shelf stacking- I was in charge of Christmas for a couple of days, basically making sure the aisle with everything on was neat and fully stocked, moving stock from various promo displays around the store to balance it up, etc.
Anyway, yeah. I have a lot of respect and started to get on with a load of people really well, which was nice because I wouldn't normally have done that.