Because he pulled the Mana from his Mana Reserves and sent it directly to a Mana Point, it technically shouldn't count towards his actual Mana. His Status seemed to consider anything located within his Mana Points to be already spent Mana.
This surprisingly explained how Mana Sickness worked, since it essentially meant an empty Mana Reserve was trying to send Mana to one's Mana Points. Because it was an automatic process, the Mana Reserve would continually attempt to do so, damaging one's health.
———
STATUS: ( - )
-Health: 162m/192m
-Mana: 3m/63.36m
-Fame: 145
-Humanity: 52
-Ascended Value: 4
-Attention: 82
-Base Soul Strength: 339987
-Soul Strength: 67,997,400
-Cultivation Base: 3.6b/100b
———
Over 30 million Mana went towards two Mana Points?!? William almost couldn't believe what he was seeing.