Charm reroll bugged?

Today I finaly get my red charm, and decided to roll it for
+10 skaven
+10 chaos
wasted around 300mats and NO such a combination,

So I asking, is this bug? or im unlucky or this combination cannot roll at all?
Keep note than I curently wearing legendaray charm with skaven and chaos in same time (just not max stats)… need some answer before continue to burn my precious mats on bug !

Thanx

Seems like it is broken since there are a few of us: http://forums.fatsharkgames.com/t/rerolls-on-charms-are-broken/23877

Why not join the Fatshark Discord https://discord.gg/K6gyMpu