strUpr(%str) $= %str returning true no matter what

[Perlin Noise]

Title says it all.
Im trying to make something that detects uppercase text, but strUpr(%str) $= %str, strStr(strUpr(%str),%str) and strCmp(strUpr(%str),%str) all return true or -1

[Ad Bot]

[Ephialtes]

-1 for strcmp means it didn't match ...

[Port]

strStr( %str, strUpr( %str ) ) == 0