They all look like that I believe. But it has die deterioration making it more pronounced. But I might be wrong. You'll have other answers soon.
I can still see the pillars behind it on this. And yours is more pronounced because of die deterioration.
We might be looking at two different things what exactly are you looking at? What's on the side of the pillars what's on the pillars? Exactly where?
Ok the top pic is from a 1988 d penny and the bottom one as well. You think i have a 1988 penny with the reverse of a 1989?