Netherite/Wooden Sword Enchantment properties seem backwards

After trying to enchant my Neth Sword 4 times in survival, and only getting max of Sharp III, Looting I, or Unbreaking II each time, I went to Creative to test and took in a lot of statistics.

Out of 20 Enchantments

Wood:

8/20 were triple+ enchanted

Av. Sharpness was IV

Av. Looting was tied II and III

Av. Unbreaking was III

 

Diamond:

8/20 were triple+ enchanted

Av. Sharp was tied III and IV

Av. Looting was II by a lead of 2 to III

Av. Unbreaking was III

 

Netherite:

4/20 were triple enchanted (no 4 stack)

Av. Sharp was III by a lead of 4 to II (never got IV)

Av. Looting was II

Av. Unbreaking was II

 

I know that enchanting is entirely random and can mean I'm just unlucky today, but here's the kicker.

 

I tested it with Picks as well. Netherite out-performed by a long shot to any other material pick. Is anyone else experiencing this problem, or is it just terrible luck?