I found this in The Guardian
And assuming a 50:50 gender divide, polygamy not only means that women in polygamous relationships not only receive a small fraction of a man, but that some unfortunate men lower down the pecking order will get no woman at all.
I believe the above sentence has a grammatical mistake. There are two "not only" but has only one "but". If I make the sentence parallel, I have trouble in second not only, which is highlighted in bold. What should I do in this scenario?
How find some of the "not only" which does not follow with "but". In this condition how can I rephrase the sentence?
And assuming a 50:50 gender divide, polygamy means not only that women in polygamous relationships not only receive a small fraction of a man, but that some unfortunate men lower down the pecking order will get no woman at all.