way too much silicone. you only need a thin layer to seal the pan to the block. And the bead should be on the outside of the bolt holes on the pan rail both on the block and the pan. The front and rear seals for the oil pan also should have been installed without silicone underneath it. The problem that lies there is that when you go to put the pan on and fasten down the extra silicone that squeezes out will enter into the crankcase and can and or will get into the oil pan and pickup tube. Ive found many engines come in with silicone stuck in the pickup tube screen. When you go to fit the pan on the block make sure you run your finger along the silicone line and ensure it stays to the outside of the bolt holes. I also go around each bolt hole as well, this ensures that wherever you've fastened down that the silicone will surround it preventing leaks. From there a small bead around the perimeter once the pan is fitted and then smoothed over and you are done. Reference image below for what I consider a proper oil pan seal/install job.
