Druid - Hamuul Runetotem Imbue bugged in Arena

Just played a druid with Hamuul Runetotem. His imbue triggered twice each spell, skipping odd numbers. He summoned 6,8,10 cost minions by turn 5. He played 2 cards each turn. How ridiculous.

You can draft extra numbers of the same card in arena
Wouldn’t be shocked that they got a second Hamuul in a redraft pack
We know that start of game effects can stack, which would explain this