Thanks for that @
Karln
This is your transactions page and not the meter readings page but looking at the dates, I think I know what's happened here.
With your Smart Meter readings, a billing calendar change will have been applied to your account. This will have probably resulted in you receiving more than one statement during a 1 month period whilst your account balances out.
From what I understand, your account has now been set to send us your readings on the 21st of each month - this means going forward, you should receive a statement on the 21st/22nd of each month as the meters will have been instructed to send us the reads on this date only, so you can have a monthly statement for both gas and electricity going forward (the first after these changes have been applied to your account, being the charges up to 20th October showing at the top of your screenshot).
So next month, you'll see this again on your online account, above the 20th October will be '20th November' outlining your gas and electricity charges between those dates (the readings will show for 21st November, with the charges on that page online showing as 'up to' 20th November.