@ people who wondering about 2 different v-Cores, i got this answer from Asrock
It is our BIOS extra setting instead of a bug.
Normally, users could only modify CPU internal voltage.
But on this model, we mounted with extra PWM IC to let users control CPU external voltage.
In BIOS \ OC Tweaker \ CPU Configuration \ CPU Voltage, this option is to adjust CPU internal voltage.
In BIOS \ OC Tweaker \ Voltage Configuration \ Fixed (Offset) Voltage, this option is to adjust CPU external voltage.
Note: If users set CPU internal voltage and CPU external voltage at the same time, CPU voltage would only change based on CPU external voltage setting.
good question what to do now with this information, but i set both cores to the same voltage i think