A Bug with blocking with 2 swords with 2 hands

When I right click with a sword in my main hand and a sword in my second hand

What I expected to happen was...:
The model wasnt supposed to be weird

What actually happened was...:
The model was weird, one of the swords blocked and didnt block in the same time

Steps to Reproduce:
1. Have a sword in your main hand and a sword in your second hand
2. Press right-click
3. Press F5(Third Person Mode)
4. in the third person mode(there's a picture) both of the swords are blocking and making a weird model but in first person mode it looks like you block with only 1 sword(there's a picture)