Local variable doesn't override function definition

It appears that local variables don't override (global) function definitions. Can't tell if it's expected, but it can lead to interesting fails.

'------ Running ------
'Function
'<bsTypedValue: Function>
'String
'hi!
'Function
'<bsTypedValue: Function>
'String
'hi!

function main()
    test1("hi!", "hi!")
    test2("hi!")
end function

function s() 
end function

function test1(s as string, s2 as string)
    print type(s)
    print s
    print type(s2)
    print s2
end function

function test2(s2 as string)
    s = s2
    print type(s)
    print s
    print type(s2)
    print s2
end function