PIP at last year's rates

Hi, I have a couple of questions and hope somebody on here can help me, please. I have recently been awarded PIP, backdated to March this year, which is when I made my claim. Today, I was expecting my ESA to go into my bank account as usual, on a Friday, every fortnight. However, it hasn't been paid. I searched online but was unable to find an answer, so I fished out my PIP award letter to see if there was any information in it about PIP and ESA being combined into one payment day.

Hi BIS thank you.

Groan... I was worried that chasing up the DWP would be the answer. I hate phoning anywhere because my hearing loss makes phone calls into Russian roulette. I never know if the person who answers will speak lodly/clearly enough.

Also, when I reread my PIP letter, the rates are last year's, before the April uprate. Is this because my claim date was the end of March? Or a typo? I will wait until my first regular payment before seeing if I need to phone the PIP helpline, but wondered if this had happened to anyone else?