Clojurians Log v2

hi, question about manifold. Does anyone know how a stream can have a bigger :buffer-size (actual items) than the :buffer-capacity?

an example from production: << stream: {:pending-puts 0, :drained? false, :buffer-size 86055, :permanent? false, :type "manifold", :sink? true, :closed? false, :pending-takes 0, :buffer-capacity 1000, :source? true} >>

what's the version?