I was considering my first withdrawal from Gemini. When I look at the fees for withdrawal at Gemini it says for less than 10 a month it is a zero fee, but on my portfolio view my BTC trading balance is 0.17841739. When I go to the actual withdrawal page it says my BTC balance is 0.15790034. At time of posting this equates to about a $713 fee / difference. I am using the mobile app. Does this difference seem correct?