[phenixbb] problem with B-factor plot within the Structure Comparison tool

Hello All. I am trying to zoom in on a section of the B-factors v. residue plot that is generated using the Structure Comparison tool of the phenix GUI. I zoom in by selecting a narrow residue range. When I do so, the plot does not show all parts of each trace; they are broken up and/or residues are missing that are certainly in the pdb files that I supplied, and that showed up when I displayed a wider residue range. I am using phenix version 1.9-1692 on a Mac (OS X Yosemite). I'd input 21 pdb files. I've done some typical refresher-type things like closed and reopened the project, and restarted phenix (with no rationale, really), but the display problem persists. Does anyone else recognize this problem? Regards, Emily.