Would you use a hammer to drill a hole?
FFlogs is a tool, incredibly useful when used correctly.
(Disclaimer, everything I'm about to say is dependent on my information being correct, FFlogs gets really fussy with my phone.)
You have a single recorded kill each on Phantom Train and Demon Chaddernook as SMN. That sample size is far too small to be anywhere indicative of how well you perform.
Furthermore, both of those kills are from March 7th which is really late into the tier. You aren't just ranked against SMN of similar gear level, you are ranked against all SMN who upload. Get some more kills under your belt and start to look for an upward swing in your numbers.

Ideally what you want to see is a steady increase in your performance after each kill. Have a "Just a little bit better this time" attitude.