[throwayit]

You are incorrect. This is called refinancing and happens frequently. It's possible SOFI assumed his/her debt at a lower interest rate which in some scenarios could mean a lower payment and lower term. The lower rate could be due to a variety of factors including overall interest rates, a change (or different viewpoint) in creditworthiness of the debtor, etc.

Your ego and lack of financial fluency is showing - this scenario is entirely possible.