@Dragonika THis was fixed a long time ago so if you have overlapping thought bubbles again, please make a new thread.
There's currently this active issue with thought bubbles:
https://answers.ea.com/t5/Bug-Reports/OPEN-Thought-bubbles-from-sims-not-on-active-lot/m-p/8429350#M... so maybe that's what you are seeing. Please post there if it is.
Locking this thread as it's old and was fixed at the time.
Good Luck
Crin

I don't work or have any association with EA. I give advice to the best of my knowledge and cannot be held responsible for any damage done to your computer/game.
Please only contact me via PM when asked to do so.
Important Threads