Dumb Question Time

10. Though probably less and displaying as 10 as that's the least it will ever show.

It because the monster is level 1, which is independent of evolutions. I have a level 1, 96% Dratini which is 12 CP, I could evolve him into a Dragonaire (CP 22) or Dragonite (CP 50). There are level 1 Dragonites in the wild with CP 44-50.

Its because even though Kakuna has more total stats as an evolved pokemon than Weedle.... It has less attack specificilly.

Which makes total sense since it's a cocoon and can't attack.

Attack > other stats in CP. So kakuna's lower attack allows it to have 10 cp

Any CP or HP value less than 10 is rounded up to 10.