CCP something needs to change! Either spawn the belts to 100% every server reset and allow the Npc Miners to continue to mine or continue to spawn the belts with your weird formula and kill the Npc miners.
It is bad enough fighting the Npc miners for ore but to let the amount the Npc mine to count against the belt spawn is just crazy. What this does is screws the players out the ore on day one and then screws the players out of the ore the next day because of the spawning formula. This issue is even worse for players that plays later in the day because the players/Npc miners are eating up the belts before they can play. I have jumped all over Minmatar High Sec space and most belts are spawned to 60% at best but most then are below that.