would nice if you could post a screenshot of the graph, also I'm pretty sure this is possible with one account, if let's say you bot 5+ days straight with breaks or without don't matter and then manually close the bot, it will be 120hours, in this case 135hours. The only thing I can think of, cause has it myself.
EDIT: Well I don't know if it's true, but from the graph it's pretty obvious, that you had 1account running for 5days straight with brakes or without don't matter cause it still counts as botting hours, and then you terminated the bot after 5days, and there you go 135hours