Waiting 4 weeks on my first unemployment payment - 4 weeks in

I was laid off as a software tester and filed right away, and I have been certifying every week. I have read a lot of threads here and could not find my exact situation. I answered every question and uploaded my final pay stub. What would you check first?

When I finally got through, the agent said my employer had responded late. Once that cleared, back pay came in one payment.