It is neither the maximum word count nor the number of edits .... It has happened before in the forums, where I was unable to edit some posts or part of the post would be omitted and not included when I hit "post" ....Then I would be unable to make any changes.....
@Skye-N-Rain .... It happens randomly!
I increased the max characters count. Let me know if that fixed your issue. Characters count also count the HTML source not just the letters at the moment.
Thanks @Ji-N!! Yes, I think that fixed the issue~ Ahh so links and formatting elements also contribute to the word count... no wonder!! Thanks, that explains a lot~
@rainruma That sounds odd! Hopefully it doesn't happen often.
This problem still persists until now. I can't edit my really long posts, and I most of the time can for the short ones. For example: I couldn't edit this thread http://mydramalist.com/discussions/six-flying-drag... and first I solved the problem by deleting the entire thread and paste my content into a new one and edit there instead. Then, I made another mistake I wished to edit. I gave up making new threads and just noted my changes in the next comment. After that I also wanted to edit my (very short) comment on that thread, but I couldn't. A few days later I could. It's strange.

It happened when I wrote this thread as well: http://mydramalist.com/discussions/chicago-typewri...

And today, with this one: http://mydramalist.com/discussions/haeeohwa/29569-...

I don't make new threads often, but I notice that it happens when it's the first post in a thread, or when it's a long thread. But, hey, I could edit the first post of this one though: http://mydramalist.com/discussions/chicago-typewri... I noticed that because I always needed to edit the top post and the thread title whenever I updated the content in new comments. It worked fine only then.

Word count might be the culprit here, but like I said in the very first thread I couldn't edit my very short comment before.