Hello @Raazer1,
Isroc had a 24h cooldown for you to count the attempts. If the 24h cooldown wasn't over and you still battled him, it didn't count the attempts to the streak. The 24h cooldown gets added on the time you won versus Isroc, so it isn't a fixed time.
If I look to your notes I can see that you beat him a certain amount of times without the 24h cooldown being over, so this can explain why your streak is less than you had expected.
Hope this clarified it for you.
Let me know if I can help you with anything else.