You are showing her how to use the post spot on, so no problem with that area of training.

May I suggest a heavy wool blanket, can be drabbed over the love seat whilst you train her. If the blanket can be sprayed with a citrus scent (lemon/orange) this will make the loveseat even less attractive to her.

I would recommend an upright post with base rather than a carpet pad (which I think you have from your description).

They do vary a lot in cost and construction. However having the right post is essential to succeed with post training, I really think investing in a medium sized sturdy upright post with carpet or sisal rope would help your training a lot.

Place this new post as close to the now blanketed loveseat as possible, you can move it elsewhere when she is using it regulally.

Then continue to move her to her new post at the first sign of scratching, like you have been doing.

Good Luck