Slightly too much grease used there. Clean out the groves, and you want enough to make the O ring shiney, just. Main thing is t make sure its clean and no hairs
The grease does not seal the watch, it just aidsthe O rings to sit correctly when the caseback/crown are refitted
I used to service Nikon underwater cameras and have seen a load of leaks caused by over greasing, It attracts dirt and can stop the O rings moving into the correct position