Problem with tailoring skill ups

[RosstheBoss]

First, it was 46 black panther skins without 1 skill up.

Then, it was 94 othmir furs without 1 skill up.

My guess would be that this is being manipulated or is broken. I successfully made 11 othmir fur caps, 0 trade-skill ups. That's thousands of pp wasted, and countless hours of farming. I'm not trying to complain here, I'm trying to get feedback, anyone else getting totally screwed?

Spent 40k and over a week of solid farming for 10 skill points? At this rate, no I don't have 3-6 months and hundreds of thousands of pp just to get to a reasonable skill level.

Feel free to tell me I'm wrong, if you have experience. Are there times of the day that a skill up is not possible? Am I being targeted? One begins to wonder after wasting a full week of his life for zero reward.