To clarify the situation:
Corsi_8 and Corsi_7 are on your account: TZaks (email@example.com) and are copies of the experiments you created on the temporary server.
On your TZak account (firstname.lastname@example.org), you have: MRTa_final, Corsi_9, MRTa, Corsi_6, Corsi online, Corsi and MRTb. Data are currently being collected for them, and available to you via the Dashboard and the experiment GitLab page, e.g. https://gitlab.pavlovia.org/TZak/mrta_final
I could help you transfer them to your new account but you would then need to inform people that there is a new URL to access the experiment, i.e. with an extra s. I do not recommend you do that, as people will get confused. Instead, I recommend you log in onto your old account. Let me know if you would like me to reset the password for you, if you do not remember it.
As for MRTa2, it appears you created it on the day we switched server (2021-03-25), which is the reason why it is not available on pavlovia.org. Would you like me to copy it over?
So, in a nutshell, all is well, your data is safe, your experiments are running. And I would encourage you to use your old account, since it is the one where experiments are running.