Memories in tears possible bug or not correct wording

+50 % more powerful artifacts means:
50% more base stats? so instead of 30/30 it should give 45/45?
50% more enchanted stats so instead of 10 mana it should give 15
instead of 20 resource gain - 30?
At least for mana it doesnt work, suspect it need checking on other moments as well

Think I found the problem, thanks!