They also seem to have made a mistake in listing LinkedIn at the top of the "Senior" band by using Staff Engineer salaries at LinkedIn. With that fixed, it looks like Netflix leads the pack for senior software engineers.
No, this is accurate, at least according to the broadly-accepted level mapping which places LinkedIn Staff approximately parallel to other FAANG Senior. LinkedIn doesn't have a "mid-level" - they go straight from entry-level to "Senior" - and the expectations are correspondingly lower (in terms of experience/responsibilities).