On my IC-GK03 keyboard:  The numbers above the letter keys are not working right.

Number 1 does nothing.

Number 2 turns on brightness and  types a 2.

Number 3 turns on brightness and types a 3

Number 4 types: b54

Number 5 types: b54

Number 6 types: n67

Number 7 types: n67

Number 8 types: =8

Number 9 types: 9 and does a right-click

Number 0 types: /-0

I  have powered my keyboard off/on.  I have rebooted several times.  I have charged the keyboard.

What do I do to fix this?