My HEM seems to get the all-in EV wrong for sessions. If I add up the EV for all hands that I played today, it shows -600bb. The $USD EV column for the session however shows me as running -1900bb below EV.
I have no idea why this is happening... but it isn't the first time. A number of sessions show my EV to be off by thousands and thousands of dollars... yet no individual hands are wrong?