[phenixbb] RFZ is higher than TFZ

Dear all, I had one problem using phaser-MR to solve my structure. Phaser-MR gives me one solution with TFZ=15.4 and LLG=165 which seems to be promising but phenix.refine does not give me a low R values (0.4884/0.5424). I went back and checked the solution from phaser-MR, I found RFZ=18.8, higher than TFZ. Does anyone think this is a problem to solve my structure? The space group is C121, I believe there are 4 copies of my search model in ASU. thanks, Wenchang