Palladium set movement speed debuf

[Javack]

Hi there, I just started to play a week ago.
I must say it is been one of my favourite gampleay experiences.

So, to the point.
I always wear the "Master Trader Hat" (+5 mov. speed), I also have the passive skill "Armor Training" (Decreases the stamina and movement penalties from wearing armor by 50%).

Wearing the Hat with "Palladium chest" (-4 mov. speed) and "Palladium boots" (-3 mov. speed), my movement speed looks like:

+5 - 4/2 - 3/2 = +5 - 2 - 2(1'5 rounds up) = +1.

The mess comes when I carry items in my pockets.
With the set specified above, I'm able to carry a maximum weight of 12 in my pockets. But when I carry more than 7.0, my movement speed decreases to -1.

I mean:
Master Trader hat + Palladium chest + Palladium Boots + Armor training + 7.1 in pockets = -1% movement speed.

Master Trader hat + Palladium chest + Palladium Boots + Armor training + 7.0 in pockets = +1% movement speed.

Why is that happening if my maximum weight in pockets is 12?
Until now I was using the blue sand set and I didn't suffer any penalty until I carry above of the maximum weight. And the same if I dont wear anything.

I sincerely dont know if it is a bug or there is a hidden weight mechanic.
I hope the post is well explained.

Have a nice day.

[Javack]

Thank you so much
I needed to clear that it was not a bug to be fine with me haha