Nginx and subdomains

Hi,
I'm having a problem with my nginx server.
I have configured a default domain and i have 7 more domains with different configurations, because the have different uses.
The problem is that nginx apply the first ssl configuration that he see in the conf.d folder and apply it to all the other domains.
So if in the default i have TLSv1.2 and TLSv1.1 enabled in the analysis of the second domain i see that there are TLSv1.2 and TLSv1.1 enabled even if in the config file i wrote only TLSv1.2.

Can you please exaplain me the problem and how to solve it ?

Thank You,
Alexander Z