Spawning Entities Doesn't Work in timer.Create() loop

[WasabiThumbs]

The title says all. Here is my GM:InitPostEntity() function I am having a problem with, including helpful comments. The last timer in this bunch works.

function GM:InitPostEntity()
timer.Create( "my_timer", 2, 0, function() -- Every 2 seconds
	local ent = ents.Create("npc_zombie")
        ent:SetPos( Vector(0,0,40) ) -- Higher than headcrabs because I don't want them stuck in turf
		ent:Spawn()
		ent:SetVelocity( Vector(0,50,50) )
end)

timer.Create( "my_timer", 8, 0, function() -- Every 8 seconds
	local ent = ents.Create("npc_poisonzombie")
        ent:SetPos( Vector(0,0,40) )
		ent:Spawn()
		ent:SetVelocity( Vector(0,50,50) )
end)

timer.Create( "my_timer", 14, 0, function() -- Every 14 seconds
	local ent = ents.Create("npc_fastzombie")
        ent:SetPos( Vector(0,0,40) )
		ent:Spawn()
		ent:SetVelocity( Vector(0,50,50) )
end)

timer.Create( "my_timer", 18, 0, function() -- Every 18 seconds
	local ent = ents.Create("npc_headcrab_fast")
        -- This is the only one that actually works...
        -- Weird Right?
        ent:SetPos( Vector(0,0,20) )
		ent:Spawn()
		ent:SetVelocity( Vector(0,50,50) )
end)
end

--More than this, too.

[editline]9th June 2017[/editline]

[QUOTE=Lavacoal123;52333762]
~Snip
[/QUOTE]

It seems I need a [URL="https://wiki.garrysmod.com/page/timer/Create"]different identifier[/URL] for each of these timers... I'll fix that real quick and brb.

[editline]9th June 2017[/editline]

And it's good. Sorry guys!