Yes you can edit a post within ten minutes, but posts with images in them require validation when you are a new member and you receive NO notification that they have been validated, which can happen at any time in the next 24 hours. So I had no idea that it was validated until I found the post that had already had all links/images edited out. Hence why I had to repost it.
On a side note, thanks so much for dropping my rep to -129595 in one go. I really needed that from someone who didn't bother to pay attention to the way this forum works before writing me off as some idiot who didn't read the rule listing on how validation/editing works.