Hi there,
You have to also take into account your Average and Last reported hash-rate discrepancy on Nanopool. According to the screenshot you attached,
your 6 hour Average H/s was 119.4 whereas your Last reported H/s was 186 (see your Nanopool account). Basically instead of getting paid for your actual
hash-rate, you were getting for 119.4 only, which was the reason, I guess, why you got less.
PS: Your Last reported and Average hash-rate have to be close to each other, otherwise there is something wrong (10% discrepancy is acceptable).