Pantheon IP Cost is Secretly at 6300 IP

Pantheon's IP cost is 3150 IP.

I had ~7200 ip when I bought him and after I bought him I now have exactly 906 ip. That means I must have purchased him for around 6300 ip. I checked my purchase history and it says I purchased Pantheon for 3150 ip.

Anyhow I don't care, I'm not asking for ip back, I'm just reporting this.