Account for downloads happening while updating counts
Account for downloads happening while updating counts

Only set the `counted` row to precisely the amount that we actually updated.

Gankro/crates.io,Gankro/crates.io,withoutboats/crates.io,achanda/crates.io,withoutboats/crates.io,chenxizhang/crates.io,steveklabnik/crates.io,chenxizhang/crates.io,withoutboats/crates.io,steveklabnik/crates.io,Susurrus/crates.io,achanda/crates.io,BlakeWilliams/crates.io,BlakeWilliams/crates.io,achanda/crates.io,Susurrus/crates.io,Susurrus/crates.io,achanda/crates.io,BlakeWilliams/crates.io,Gankro/crates.io,rust-lang/crates.io,steveklabnik/crates.io,chenxizhang/crates.io,rust-lang/crates.io,rust-lang/crates.io,rust-lang/crates.io,withoutboats/crates.io,steveklabnik/crates.io,Susurrus/crates.io,BlakeWilliams/crates.io,Gankro/crates.io,chenxizhang/crates.io