Lasso Mask Tool changes My Selection After Closed. How can I stop this?

So I've always had this issue but it seems to be consistently getting in my way today. Is there some kind of setting thats turned off or on to make this happen? You can seen the green area I selected precisely and now every selection after that seems to be guessing what I want to be selected. I want it to only select exactly what I tell it to select. What can I do to make that happen?

Here's the screenshot to show what's happening

Selection Screenshot