That's working properly. If you use flowers on a companion type that you already have, you may fail to get the LG version of him, but you will have been successful in increasing your odds of getting an LG in the future.
Will modify wording to make that clearer.
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Computing the probability that at least one of the following events will occur:
P(a or b ... or z) = 1 - P(!a and !b ... and !z)
Probability
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