One day I started by playing a couple games and I noticed I just was NOT getting pillars. If I was lucky I'd get one pillar. I was thinking "do I SERIOUSLY need to add more pillars?" and went to look at my deck and saw that all but one of my Emerald pillars were removed from my deck and put back in my card storage. Now I KNOW I didn't remove those pillars because Life is my main mark and I never ever remove my life cards. Someone else doing so is out of the question because I live in a single room dorm with no one else ever touching my computer. No one knows my ID/PW either.
Another time, I started a new account and removed the three quantum pillars and dagger that they give to you as a part of your starter deck. Next time I logged in, they were added back in. I really honestly did not put them back in.. :S