Customizr structured data errors

Hi all,
I recently switched from twenty twelve to Customizr for my website florenceitaly-attractions.com.
Since then, Google webmaster tools shows many errors in structured data, like:

Missing: author (pages and home page)
Missing: entry-title (home page)
Missing: updated (posts, pages and home page)

I searched around the forums:
– posts: this shouldn’t happen, as Customizr developers fixed this bug. I tried some solutions found in the forum, but they’re old and apparently the bug has been fixed and their solutions already implemented.
– pages: found nothing apart some forum member saying that this won’t affect rankings. Even though it won’t, I would like to fix this, because all those errors make difficult to see if there is other relevant ones.

To be honest I had the same problems with Twenty Twelve, but I fixed them with code snippets found around this forum. For Customizr, I din’t find any suitable solution so far.

Please notice that I have zero experience with coding and would need someone to tell me what to paste and exactly where in the code.

Thank you guys.