If you go into Broswe Folder, 'select' auto detection', select 'don't mix landscape and portrait' , select 'group by focal' after the software groups the photo's it thinks it has detected as panoramas, I still find portrait and landscape photo's in the the same filtered groupings.
Also 'group by focal' will put most pictures taken with the same f/stop into similar groups but if the pictures taken for two different panorama's have identical f/stops but used different shutter speeds they also appear together in the same grouping which is not correct.
(1) portrait and landscape should be separated in respective groups unless specified. This still doesn't work.
(2) panorama's should be also separated by 'both' f/stop or 'focal' and 'shutter-speed'. I have found multiple panorama's grouped together because they all share the same f/stop but each panorama was taken at different shutter speeds. Shutter speed can further separate pictures not belonging together in different panoramas. Hopefully this will be worked out in later editions of the software.