How this can be possible?

[blacktraffic]

Means you captured two PMKIDS  from two separate clients.  You should not post hashes however but the output you have posted is in the format of:

PKMID*AP MAC*STA MAC*ESSID

I had two like this, on a brief test, for my own router and they cracked to the same value. You will see this with a lot of salted password hash types as well, like sha512crypt for example.