Hi, there are some very expert experts on here, who will give you the definitive answer. I noticed on the TfL site, Single Fare Finder, Strawberry Hill,(Zone 5) to Old Street Underground, (Zone 1) that the peak fare is £7.60 and the off peak single fare, which includes Sundays is £5.40 so you would expect to have paid £10.80 yesterday.
£11.15 is the combination of the single journey fares at £2.60 (Shoreditch High Street to Clapham Junction, Clapham Junction to Strawberry Hill £3.20. Strawberry Hill to London Waterloo is £3.80 and the bus trip £1.65.
The TfL site also says the Off Peak Cap Zones 1 to 5 is £13.10 so you didn’t exceed the amount the amount for the amount to kick in.
Just my two-penneth’ worth
Kind Regards
Mike