No more edit option for my post (24 hours after publishing it)

I already wrote about the problem of being unable to delete a post (which will remain in the blockchain forever, even if removed from Steemit). See the post here: https://steemit.com/seemit/@andrew0/steemit-posts-on-the-blockchain-how-to-delete-them

This time I experienced another problem with the "edit" option.
It just disappeared after about 24 hours from the publishing. Am I missing something?

I like to read a post many times after it has been published, to ensure everything is written perfectly and contents are optimized as I want. But this time I don't get the option to do it anymore.

This was my best post, I worked about 4 hours on it and I was still working on it when the problem happened.
(if you are curious the post is here https://steemit.com/music/@andrew0/the-dharma-fire-band-music-giveaway-project )

Any help from experienced users/insiders?

Thanks in advance