Taking 50% comission

why envato is showing 50% of total earnings to account.

People are probably going to need a bit more to go on. A lot of people get 50% because they’re meant to earn 50%. Are you mean to earn 50%?

But if I had to guess, you might be on about the rates for the separated support feature on Themeforest stuff? If you add what you’ve got for the item plus the support (there are two lines now in your statement), then you might see it’s more than 50% (if you’re meant to be getting more than 50%). If so, there are several posts about this already.