I am not sure how you defined these solid rectangular cross sections. I have defined the same eight cross sections using the Define option within the Properties - Whole Structure dialog box and added the PRINT MEMBER PROPERTIES command. The analysis output file ( ANL file ) lists the cross section properties for each section as shown below. As you can see for these rectangular sections a 0.85 form factor has been used for both Ay and Az. These values of shear areas are actually used by the analysis engine to calculate the shear deformations.
For your reference, I have also attached the .std file I used for this testing.
(Please visit the site to view this file)