Is it correct to sit trot over trot poles?

Hi all,
I'm a pony club mum with a bit of a horsey background. I'm really surprised at our local pony club that the kids were asked to do trot poles, sitting to the trot, sitting back.
Is this correct?
I was always taught to go into the forward leaning seat!
My kid is starting to jump, and it has confused the hell out of her. So when we've got home I've set up trot poles and taught her the correct forward leaning seat to help with her jumping.
Is it just me, or is that how it is taught now, and why? How would this help teach them the correct position over jumps?
By the way my daughter is 13, and a good dressage rider, and it was the whole group being asked to tackle the poles in that position.
It's hard as you can't question the instructors, but geez it makes it impossible to help your kid when you think what they're being taught is incorrect. Feedback very, very welcome.
Thanks,

I usually use trot poles as a means to practice my two point. Occasionally I use them while doing dressage work to help my horse extend his trot and use really small cavalettis to encourage him to pick up his feet, and this I will ride using a dressage seat.
I think its more common to use two point because poles are more commonly used in jumping lessons, but there is no reason why poles can't be used for both sports, and naturally they will be used accordingly.

In what context were they using the ground poles??

IT can be done I did recently for fun.

I always was taught that trotting over ground poles and cavaletti was to be done in a two point.

Maybe they have another agenda for the ground poles at this point?

I've been tought both ways. It depends on what type of riding. In Dressage it can help extension, in jumping it helps with 2 point and getting ready for the jump.

Doing sitting trot poles really works the core, and as long as they're not flopping around on the horse's back then I don't see a problem.

Now, for jumping you do want a forward seat, perhaps they will get into that soon?