I play tested all of the different combinations of what was or wasn't on my Sims computer desks.
Finally, I had to remove all of the Exercution Executive Desk Thrones from all computer desks, as well as from chess tables and card tables (32 chairs, in all --- 16 computers with all upgrades).
I also had to remove 14 Smptuous Floral Fantasy Arrangements from each adult computer desk. The children's 2 computer desks had different flowers. It is fine to keep Smptuous Floral Fantasy Arrangements on an end table, coffee table, hall table or dresser, etc.
Instead, my Sims are using the §185 comfort 3 swivel desk chairs, as well as at their chess tables and card tables and the vase of pink or blue §450 flowers on their computer desks.
My Sims have full autonomy and all of the doors are open, and they are able to hold their 2 programming work homework clubs (8 members in each club --- so their extended family can do their programming work homework, too.
The 2 children can sit at their computers in the children's computer room and go on Simpedia.
Therefore, this is what I ended up with:
close up of a computer station
Thanks
@Playalot,
@MrsFlynn ,
@Rangervegas and
@reggikko for helping
!