Interesting.. any clue on or about the dates you posted them? As far as I can tell nothing was deleted.. but I suppose it's in the realm of possibility that some things didn't make the server migration (was about a year and a half ago).
If you have any more detail (thread title name, content, etc) I can search the old database (maybe) to see if I can pull it up.
Maybe at some point in 2014/15? One of the two titles was “Flygirl: Adventures of A Human Pet”. I think that was the title, or maybe a variation. I might have mentioned it and or one more on the Vortious Customs Thread I used to post on alot. Just searched through my comments on the Vortuois Thread. My first reference to brainstorming the Flygirl story came in a comment I made in the thread in July of 2014. I could have actually written it between July 2014 and late 2015.