Animated seat is making the leg stay bent?

seat = script.Parent
function added(child)
    if (child.className=="Weld") then
        local human = child.part1.Parent:FindFirstChild("Humanoid")
        if human ~= nil then
            anim = human:LoadAnimation(seat.sitanim)
            anim:Play()
        end
     end
end

function removed(child2)
    if anim ~= nil then
        anim:Stop()
        anim:Remove()
    end
end

seat.ChildAdded:connect(added)
seat.ChildRemoved:connect(removed)

The animation plays, but the leg is still bent as if the seat's animation has higher priority. My animation priority is action so it should be the highest. I tried waiting and playing the animation but it onnly shows a flash of the legs being straight then goes back to being bent. How do I remove the default leg bending?