Reverse Pivot?

All of the instruction I've seen indicates that one should shift the weight to the

right foot/leg during the backswing, then shift it back to the left/forward leg

during the downswing. I've looked at many of your videos and it's clear that

you want the majority of weight on the lead foot to start and finish the swing---

it almost looks like a reverse pivot. Could you clarify what's going on here?

Thanks-----Mike Murdoch