I don't have access to my current bill, but my past old bills had multiple lines for generation and delivery. I'm not sure why you have that change, but it's either methodology/rate change between 2022 and 2023 or something else. You'll need to wait for next month's bill to compare. Let's say you used 779 KWH for one month. There's a base rate for the 779 KWH delivery. Then there's different additional rates that are tacked on based upon time of day (high demand vs low demand times). That's why you have additional 251 KWH and 528 KWH rates for both delivery for that period.