This is expected behaviour. For the rouletteewheel each element is chosen with propability proportional to fitness, so good members may be selected more than once - maybe even the same for every roll oft the wheel, but that would be very unlikely.
I cant remember how the other selectors work, but thats enough to understand the principle.
Again, question to see if someone can shed some light on this: I'm trying different selection strategies and have run into cases where the same element is selected more than once. Is this expected, or I'm doing something wrong, or have I just hit some corner case?
Thanks for the help.
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