https -> wrong site served

[oltremedia]

My vps has Plesk 11.5.30 on a centos 6.4 Final OS

I have several webspaces on it, some of theese are on the same domain name:

• domain.it
• staging.domain.it
• xxxxxxx.domain.it
• myfacebookapp.domain.it

the main domain "domain.it" is setup in plesk to have domain.it preferred domain so if I browse tohttp://www.domain.it I get redirected to http://domain.it

I'm using one third level domain to serve a one page Facebook app so I installed an ssl certificate on it and it is working fine.

today looking at google I found a link to my facebook app page with this link:

https://domain.it

and that browsing that link I see a broken version of the page that should be served from https://myfacebookapp.domain.it while I expected to see the site at domain.it!!!!
Can someone Help?