I noticed that too, it sure does seem really strange. I noticed an error in an old post, and could not change it. This is not very common in most other sites I peruse. Sometimes a link needs to be changed or corrected to, not just correcting grammatical errors.
I don't really think there needs to be a time out on editing, or at least it should be a day or two.
2017 Escape 5.0 TA
2015 Ford F150 Lariat 3.5L EcoBoost
2009 Escape 19 (previous)
“Most folks are about as happy as they make up their minds to be.” — Abraham Lincoln