I have noticed that when you win a ticket into a tourney from a freeroll and then do not cash in that game it counts as a negative in the amount of the buy-in without offsetting it by a positive in the amount of the ticket won. Therefore if you have an ROI of 0% and win a $215 ticket and do not cash your ROI will show as -100%. Which is in error considering your investment is $0 as the ticket was won from a tourney with a buy-in of $0, so in effect the ticket cost you an investment of $0.