Oh, geez, tell me about it. That's basically my job all day, which is to order, sort, file and pull comic books out of long boxes. A whole warehouse full of them. And over the years, various companies have gotten creative with how they number their comics. Vertigo is pretty bad, with most series being numbered at the bottom, and a few, like Fables, being numbered where I have to hunt on the cover to find it.
There have been other things, such as Marvel used to only put the number inside the barcode in the bottom corner, or had a tiny font with a color that blended into the background for the issue number. I can also bitch about variant covers in general, but Marvel occasionally likes to pull "Variant cover is same as original cover but with subtle change", which makes my job harder.
And seriously fuck Richie Rich.