Best answer by Tim_OVO
If you're looking at the My Payments section of My OVO, this will show each monthly Direct Debit payment as it's paid, along with your monthly statement. This payment tops up your OVO account balance, and your statement will deduct your usage costs from this balance. To view your usage costs for gas and electricity separately, open up your statement (in the My Statements section of My OVO), and scroll down to the relevant page. Give this a go and let us know how it goes.
I've tweaked the title and added some tags in case other users have the same question and find this useful. :$