Help me understand Google search results

[BarkingKing]

Hello,

 

I'm trying to understand a few oddities with Google's results for my website (see signature for url), that to improve my SEOs.

 

A search for "broche tete de chat" returns 3 of my products in 2nd, 3rd, and 4rth positions on the 1st page. My product page uses schema.org metadata, however Google displays that information, such as price, only for certain items. Why is that?

 

Many more products qualify for this search, but they are not returned at all except when specifying site:barking-king.com rapporte 5 pages. Why is that? Certain of those products are older, and are indexed by Google anyway; they should appear in a standard search.

 

Than you in advance for your help.