Yep, it's normal. They charge you for it before it get's to the worker who will process your application.
When I applied last summer I can't remember if they were doing emails or not, but they will be sending you out paperwork relatively shortly for you to go get your biometrics done. Make sure ALL the info on the paperwork is correct, they miskeyed my birth year. I was 108 years old for a week or so according to the UKVI. They will correct any mistakes, it just adds time. It took a week for me to get my new biometrics paperwork.