No, I didn't deleted them, they definitely saved, which is why I was able to retrieve the edits from the history. I'm more curious why someone thought my edits were worth removing in the first place, as this has happened more than once.
Maybe some snobbish registered Wikipedia users think that edits from unregistered people (like myself) aren't worth keeping. Or something. EDIT: WTF, the "Creation" section shrank from my five paragraphs to the original two again. I restored it...AGAIN. I think they didn't like that VGMaps.com was mentioned again in the middle, so I edited it while retaining the point about PNGs over JPEGs.
The images were nice, and I agree with Revned that they weren't super-essential. If this was fleshed out into more of a mapmaking tutorial, some images should be there at least, though. I'm sure there are concerns other than parallax.