My speed only changes once despite meeting appropriate conditions?

local PAGE = script.Parent.Parent
local PlayerAge = PAGE.AccountAge
local PlayerName = PAGE.Name
local Character = PAGE.Character or PAGE.CharacterAdded:Wait()
local PSPEED = Character:WaitForChild("Humanoid")
local ageInMonths = math.floor((PlayerAge * 100) / 30) / 100
local ageInYears = math.floor((PlayerAge * 100) / 365) / 100

game.StarterGui:SetCore("ChatMakeSystemMessage",{Text = "Welcome "..PlayerName.." Your account age is "..PlayerAge.." days old",Color = Color3.new(0,196,255),Font = Enum.Font.ArialBold,FontSize = Enum.FontSize.Size32})
if PlayerAge < 30 then
	game.game.StarterGui:SetCore("ChatMakeSystemMessage",{Text = "Which isn't even a month. ",Color = Color3.new(0,196,255),Font = Enum.Font.ArialBold,FontSize = Enum.FontSize.Size32})
	else
end
if PlayerAge < 365 then
	game.StarterGui:SetCore("ChatMakeSystemMessage",{Text = "Which isn't even a year, But it is however "..ageInMonths.." months old.",Color = Color3.new(0,196,255),Font = Enum.Font.ArialBold,FontSize = Enum.FontSize.Size32})
	elseif 
    PlayerAge > 365 then
	game.StarterGui:SetCore("ChatMakeSystemMessage",{Text = "Which is "..ageInMonths.." in months".." or "..ageInYears.." in years",Color = Color3.new(0,196,255),Font = Enum.Font.ArialBold,FontSize = Enum.FontSize.Size32})
end

-- speed
if PlayerAge > 10 then
	PSPEED.WalkSpeed = 12
elseif PlayerAge > 20 then
		PSPEED.WalkSpeed = 15
		elseif
PlayerAge > 50 then
			PSPEED.WalkSpeed = 22
elseif PlayerAge > 100 then
				PSPEED.WalkSpeed = 27
elseif PlayerAge > 200 then
					PSPEED.WalkSpeed = 35
elseif PlayerAge > 350 then
						PSPEED.WalkSpeed = 42
elseif PlayerAge > 500 then
		PSPEED.WalkSpeed = 50
elseif PlayerAge > 750 then
			PSPEED.WalkSpeed = 60
elseif PlayerAge > 1000 then
				PSPEED.WalkSpeed = 70
end

the only really relevant part is the '--speed-' part my account age is 500 yet it only sets my walk speed to 10 and not the appropriate 50, what wrong?

SOLVED IT: reversed the numbers like this thanks to a guy on discord

if PlayerAge > 1000 then
    PSPEED.WalkSpeed = 70
elseif PlayerAge > 750 then
    PSPEED.WalkSpeed = 60
elseif PlayerAge > 500 then
    PSPEED.WalkSpeed = 50
elseif PlayerAge > 350 then
    PSPEED.WalkSpeed = 42
elseif PlayerAge > 200 then
    PSPEED.WalkSpeed = 35
elseif PlayerAge > 100 then
    PSPEED.WalkSpeed = 27
elseif PlayerAge > 50 then
    PSPEED.WalkSpeed = 22
elseif PlayerAge > 20 then
    PSPEED.WalkSpeed = 15
elseif PlayerAge > 10 then
    PSPEED.WalkSpeed = 12
end