This shows that each leg of the double breaker delivers 30 Amp. There is a possibility that this is true. If a 30 Amp double pole breaker was used on each leg, a 20 Amp double pole breaker would be used on each leg. Each leg would have a double breaker of 7.5 Amps.
Let's Get It Fixed!
HomeX virtual experts will assess your issue (for free!) and can resolve simple problems.