I have no idea why this happens:
Kali says my mac starts with 8A but it actualy starts with 88 and the rest of the mac is correct.
Do you have any idea?

@LeFlawk i'm listening 😊

@LeFlawk yes ! Very sure

Interesting, the only incorrect changed nibble is the one with a special meaning. The first LSB indicates whether the mac-address is a broadcast- or an unicast-address and the second LSB indicates whether it is a real or an artificial address (vendor-supplied macs always have this bit set to 0).
But your real and the wrong mac-address have these bits set to the same values so i don't think this helps. It's good to know though.