Level up but not so fun one...

I did lvl up yesterday and i got the worst ever lvl up i think in lineage history, 6 hp and 6 mp.
Im a con/wis mage and for HP mini is 6 and max 9 average is 7.5 and for MP mini is 6 and max is 12 average is 9 (if www.lineagedb.com is correct).
How come i can get mini for both HP and MP, what is the odds for that?