The 90 should be seen as a placeholder amount. When you deposit 200 you also get to deposit the full amount Available (90) for a Deposit of 290. But, a Claim just removes the amount from your principal, and is all or none, so you’d receive 90, and the Deposit is reduced to 510.
Better to Deposit first, for 890. Then Claim less frequently than Deposit, if you want to also grow your stake. Take a look at CryptoStu’s Futures Calculator to better understand how it works.
https://docs.google.com/spreadsheets/d/1eq1T4F7nvzIOokKvXT0V6yn6ZHfJaNnYoXxY7xf1AwA/edit?usp=sharing
FILE>Make a copy