Baffling Orbs With Curved Stripes

The photos below show two orbs I photographed indoors on September 20, 2016 and September 22, 2016. The bottom orb has a type of stripe called a shadow stripe, in which a thick stripe is flanked by two thin stripes. I have 18 previous times photographed orbs with these shadow stripes, as shown here.  I have many times previously photographed orbs with curved stripes like these, as shown here.