There is nothing wrong with those dependencies, despite them being circular. Simplifying the names... posix-2.10.8 relies system-2.10.3 or higher, and system-2.10.8 relies on posix-2.4 or higher, so version 2.10.8 of both packages means they both satisfies the other's requirements.
PS: In case this is the source of your confusion... 2.10 is a higher version than 2.4