GMAT Sentence Correction (SC) | Re: The proliferation of so-called cybersquatters, people who

I have a question: If E is incorrect because "passed" and "allowing" are not parallel, why in other questions using -ed modifier and -ing modifier is considered parallel?????

For example:
Scientists have recently discovered what could be the largest and oldest living organism on Earth, a giant fungus
that is an interwoven filigree of mushrooms and root-like tentaclesspawned by a single fertilized spore some
10,000 years ago andextending for more than 30 acres in the soil
...

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