Well, I had 2 bonus traits somehow and I wanted to know why so I did some testing that gave me mixed results.
I started a fresh new game with a new character and I placed him on an empty lot where I bought a dresser to have limited access to CAS. I used the cheat to speed milestones and quickly finish aspirations. As usually I started with a nature aspiration, got the collector bonus trait from the start and a few seconds later the aspiration was complete with naturalist reward trait, nothing new. I choose next bodybuilder, I noticed that the bonus trait was not showing in simology panel so I clicked the dresser to check the CAS and lo and behold the fast metabolism trait was there. Exiting CAS the fast metabolism trait just appeared in the panel.Check the pic.
If I chose a new aspiration and fast forward to complete it then I will never get the bonus trait. So if you want the bonus trait for the new aspiration all you have to do, after selecting the new aspiration, is to enter CAS with a dresser or even with a mirror and you will get the bonus trait for the new aspiration. Here is the kicker: if you ever buy a trait from the reward shop,many times in CAS ,any reward trait purchased with aspiration points will replace the bonus trait. To correct it you have to save the game, exit sims 4, restart , reload the game, enter CAS with dresser or mirror and the bonus trait will correctly be displayed. After exiting CAS the bonus trait will show in simology panel.
My conclusion is that you are entitled to ALL bonus traits but there is a mild bug that prevents you to get them.
EDIT: (I fixed your pictures
- mtglady)