every axe is better than the diamond sword at 9 attack dmg where as the diamond sword is 7

What I expected to happen was...:

the axe should be less than the sword otherwise the sword would be useless

What actually happened was...:
every axe is as good or better than the diamond sword

Steps to Reproduce:
1. craft an axe
2.  then you would see the bug in the details of the axe stone and up would be nine and wooden would be 7
3. ...