Some BUG about ability points! Check this out PLEASE!

first of all,I’m a chinese player,my english is not good enough,so i used Translation software,i hope you guys can understand.

  1. The archer has no change in weapon damage after investing in agility, which I think is a bug. Fighting the same monster, in the case of 13 agility, the damage is 15, and in the case of 26 agility, the damage is still 15.
  2. In the case of all weapons level 3, the damage done with a bow that requires 26 agility and 26 intelligence is the same as if it were a bow that requires 13 agility. So why don’t I save my ability points then put them on focus or life? I don’t understand the design intent at all. Is the requirement for higher attributes in exchange for just a change in appearance?