You might have just been really unlucky with your Night Lord (given that that have a skill that increase drop rate by 15% if you only kill monster with it, the drop rate however does not apply to marks) and really lucky on your pathfinder, as the first familiar drop usually take on average 1 hour.
You should have farmed a mixed golem familiar for the +20% drop rate before attempting this to make it easier.
Some issue with your data collection.
Should have separated the data after you started to use the big spider familiar on your pathfinder.
Getting combo orbs on your NightLord will inflate the monster kill count (also one of the faster class to generate combo orbs when marks is active), as exp from monster from being overleveled is reduced by 30%, where as the exp from combo orb remain the same.
Need more data than just from 1 trial.
Lotus has 300% damage reduction.
With 67% ignore defense, you only ignore at most 201% damage reduction (since you are doing 1's, you actually have 66.something ignore defense), and Lotus still have 99% damage reduction.
If you have one more line of ignore defense, you will start doing damage to lotus.
If you are Kaiser, Angelic Buster, or Cadena, you must must of their important nonfiller story line quest up to lv 90 to unlock the Magnus arc of their story line quests.
Always change channel if you use the boss queue or is on the channel that the boss queue that.
This bug occurs because too many people are trying to fight Horntail on the same channel. (The game at some point (after an unknown amount of people has entered) failed to properly prepare that particular instance of Horntail that is assigned to you)
