This arrived today because I was unable to cancel it 2 hours after ordering . I wanted to cancel because there were 2 conflicting assembly PDFs in product info. One showed stationary shelves and the other( Hulala manufacturer) showed adjustable shelves and listed 8 pegs in materials to be able to adjust them. Multiple calls to Wayfair gave me no definitive answer either so I resigned myself to having to return it. I needed adjustable shelves to accommodate some liquor bottles. 
I’ll be keeping it! The shelves are adjustable! ( perhaps the sideboard is made by different manufacturers under the same supplier name but we received a Hulala Home piece. 
It is beautiful and fits perfectly in the space I wanted to place it. 
I’m Very happy with it