In theory every jump pole should be able to fall off forwards when knocked - in the first of the spread photos, the top pole is on the takeoff side of the red block and wouldn't be able to come off if Zak clouted it. If the pole can't come off in the direction the horse is jumping you risk taking a tumble should the pole trip them up. So on those blocks the pole should always be placed on the landing side. Doesn't matter though - you both look great & Zak seems to be having fun! You already have a nice position for someone who isn't used to jumping and as long as you aren't hindering the horse there's nothing to worry about. Although going on the first two photos I would suggest your stirrups are a little long for jumping, it would be easier to balance over the jumps if they were a bit shorter and it looks like you were having to "stand" in the stirrups when you went over. Lots of trotting and cantering in forward seat / jumping position will help too. It sounds like you have a good supportive instructor who understands that you have goals but aren't necessarily going to rush to reach them, and it seems you have a very willing partner in Zak - he has Happy Ears here!