I was playing a campaign game against Tezzeret which I believe was located on the bottom of the first circle in the campaign menu. He played a 4/4 Artifact creature with a Metalcraft ability saying it gets +2/+2 if you control 3 or more Artifacts. He had one Artifact and got the +2/+2 anyway, I had three Artifacts on the field myself which leads me to believe it was counting my Artifacts as his.
In the same game he played a card stating target creature gets +1/+0 for each Artifact you control. He had approximately none, I had three still and his creature got +3/+0 anyway.
I'll try playing him again later to see if I can get the two card names. Hopefully this gets fixed though because he ended up kicking my @@@, lol.