Early esa payment due 22nd, went in 21st?

I know I may be being silly... I didn't even know payments were going to be made early. Anyhow, ESA was due 27th and went in 21st of this month. I looked online and several sites state payments due 26th or 27th will be paid on the 22nd (last working day before bank hols, apparently). Should I be worried it went in on the 21st?
Also, under the ESA credit there is a big long reference number, where there normally isn't one. I have horrible anxiety on top of a physical condition so I am aware I may be being ridiculous. I just don't want my next payment to be messed up and have to call them. Anything that deviates from the norm throws me!
Does this sound normal? I'm just worried it says the 22nd on sites, and they also says some benefits may be paid as much as five days early, but mine has been paid 6 days early...

Also, quick question for Gordon or another moderator: I think my subscription expires later this month. Will I receive an automatic email message to resubscribe? I think I did last year.

Thanks. And thank you to all those who run this site, and I hope everyone has a lovely Christmas.

Thank you, Gordon, for the explanation and reassurances. I'll wait to hear re my subscription renewal.

I hope you and all the mods have a wonderful, well-deserved break this year