e-EDID header is different from standard?

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I'm reading EDID information and receiving weird headers from two of my monitors. They can both play sound, so they must be running e-EDIDs. From what I've read, though, the header information doesn't change from an EDID to an e-EDID.

What it should be

00 FF FF FF FF FF FF 00

What I'm getting

00 FF FF FF 59 65 00 00
00 FF FF FF 4C 5F 00 00

Do e-EDIDs have different headers than EDIDs, and what specification can I read to find out more?

My reading:

https://en.wikipedia.org/wiki/Extended_Display_Identification_Data

http://read.pudn.com/downloads110/ebook/456020/E-EDID%20Standard.pdf

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