Client Cannot See Or Do Actions The Server Can

I am making a first person shooter, and I have a teleport ball that teleports the player to the area that the player launched it. I made a simple LAN host-join system, but when I try to have some fun and teleport around, the client seems to not teleport. Another problem I am having is that I have a lot of physics enabled objects, and I can shoot them and they go flying! The only thing is when I shoot something with the client, the object goes in a different direction. When the client steps on the object, he teleports to many places until I get off the object. The last problem I have is that when I try to host with the client, it cashes. I know some of these problems are caused by actor replications, but when I check “replicates,” or “load to client,” nothing happens