That is weird for multiple reasons, first of all you shouldn't have been able to GM Mining so fast, second are the mining drops, third is the skill cap. I will look into these issues.
Hm i guess Mining ist just one of the skills that rises quite fast. Also I have been Mining A LOT these last days. Other skills that are supposed to gain slow actually do. For example i spent about 16k of ingots to gain from 32 to 43 Blacksmithy.
About the ores: I have only been mining in Minoc mine, maybe thats the issue?