Why did you transfer to Lagos?
There’s no minimum time to be in a country for a consulate to accept a case, most just require proof of residency but can refuse if they wish - they’re not obligated to accept a case.
Yes, 2 years is normal for Lagos. Your DQ isn’t relevant as you weren’t eligible for a visa until this month anyway.
As above, when does your employer want you to start? If they want you sooner they may have to sort you a temporary visa. Is it a company transfer, maybe L1 would be better?