Hermies shouldn't occur in highly worked lines like cheese, it's evidence of poor breeding practices. The original Cheese cut WILL throw male nanners, but only if you stress her and let her go long (past 70 days).
Sounds to me like that one plant had a small hermie issue, don't worry about the odd seed, the potency and high will not be affected, after all, no-one hardly in the west had smoking sinsemilla buds without seeds until the mid 70s, yes, all those legendary Acapulco Gold, Colombian Gold, Panama Red, Chocolate Thai, they were all full of seeds but they still got people nice and high.
Just make sure you don't keep a clone of the plant that grew the male flowers.
This is why I always stay clear of feminised seeds, hermies are often common, every feminised seedline I have grown (Zamal x Nev's Haze, White Widow, Northern Lights, Purple Power, Easy Sativa, all from Female Seeds and Sweet Afghani Delicious from Sweet Seeds) have had plants with male flowers, this to me is not acceptable. I understand why feminised seeds appeal to people, but I still think everyone is better off growing normal seeds, selecting the best females and cloning them for future grows. I blame the high price of seeds for many bad growing practices. Back in the day we would start a couple of packs (and many packs were 15 seeds then) and just throw all the males and any females that were weak looking, this is much better practice, the more plants you start with, the more chance you have of finding a keeper. But who can afford to buy two packs these days?
