From the code you've posted, everything looks fine. If you were overreleasing you wouldn't have nilled out pointers in the array, and you have two elements which makes sense seeing as you call addObject: twice. The one thing that might be wrong is your initialisation of the cycloneDatabase array.
Check you're initialising it correctly cycloneDatabase = NSMutableArray alloc init . I can't say I've ever seen this one before though.
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