Why code in top level got run 6 times.

[weire]

if TheNet:GetIsServer() then
    dosomething(config_data, nil, true)
else
    dosomething(config_data, nil, false)
end

I have this code in the top level of a lua file, and when enter the world, dosomething is run 6 times? why it's not simple 1 on server and 1 on client? is it run both on cave and master? even so, it's only 4 times