Nexus 2's staging system always appends (post-pend) a new staging repository in the staging group. This means that new staged artifacts may be occluded by older artifacts in previous staging repositories.
It would be good if this could be configured to be a pre-pend order or not. It be great if this was available for Nexus 2 (since it already has staging) but definitely for Nexus 3. As it is, I have to run a cron job which forcibly fixes the order but this means there's a race condition present on the repository ordering.