Cant account for a 0.2 increase in my total ETH holdings, help / question

So here I am accounting for all my coins and I came across something interesting. I bought roughly 1.0 ETH on Coinbase over the course of two months and after transferring it to my cold storage I now have 1.2 ETH. Did it deflate in value? I am confused. Coinbase says I only bought roughly 1.0 ETH when added up and shows a transfer of 1.2 ETH