Realms not saving what I did

I got on my realms server and did the following: /gave myself a crafting table, placed it, /gave myself a name tag and named a cow, made 4 cakes, gave 2 cakes to my friend, then got off. When I got off, the crafting table and name tag had disappeared. I was where I was before I got on the first time. My friend had the 2 cakes I had given her, but I didn't have the other 2. This is not the first time this happened.