Confuzzlement

So I was excited to see what my principal/interest ratio would be when this month's vehicle loan went through. It did today and to my surprise, there was only 50 cents of interest saved this month compared to last month.

I paid $500 extra on the principal amount this past month and I thought the interest would show a big difference.

That's how it worked on my last loan.

How sad that it did not.

and how odd.