Ours did the same thing. I put a small bead of clear silicon around the edges of my replacement boards and haven't had an issue. I also put a bead of silicon around the inside of the sink. I could see some areas where the installers missed. We make sure that the sink is dry before putting them back on.
We used a cutting board for top of the stove and one for each sink... go to the dollar store and get some sticky rubber feet. Stick them on strategically and they won’t slip around