The ones in the little plastic bags during the spring and summer are almost always mislabeled. daffs are the only thing I have had good luck with, maybe tulips-I don't buy those so I don't know. But the fall bulbs seem ok.
Floota-rust isn't a problem in many parts of the county-our cold winters keep it under control here. I can see where in warmer states it would be risky to buy dl from not so reputable sources.
Today I bought a Midnight Marvel Hibiscus at Walmart for $8! It had huge deep red blooms on it and purple foliage!