So yeah, as I mentioned before, that last set was a request for something from that specific model, who never made it past being a "SG Hopeful" (which is a model who has never had a set purchased by SG). Many models who feel as though they can get their photo sets purchased elsewhere will pull their sets from SG, which appears to be the case for this model. Just the one set remains on the site, but there's definite evidence that there was more sets posted in the past.
Discussion
Unfortunately, this model never left info on the SG website regarding other sources of content, so wherever her stuff ended up, I can't find it without doing some Google sleuthing. I think in the future, if I ever come across sets that were pulled from SG I'll respect the model's wishes and not try to find a source for that set elsewhere. I did that a few times in the past thinking it was SG themselves pulling the set, but now I know SG would be more than happy to keep sets they never paid for.