+OPK and -OPK with same urine sample--HELP

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opk and -opk with same urine sample--HELP" />
Ok I'm stumped. I have an Internet cheapie that looks positive. But conflicting ClearBlue results. ClearBlue advanced (purple) is negative and regular ClearBlue (pink) has a happy face. Which should I trust? All tests were taken from same urine sample. 

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