We haven't deleted anything from the dev tracker - I believe that, occasionally, when the dev tracker pulls posts, there is a time period during which you'll see less pages than are actually there. This should be resolved shortly (and if it isn't, there may be a bug we're unaware of). I'll keep an eye out and make sure something unintended isn't going on.
Thank you for your response. I can't say I've been pleased with the amount of communication, but I am glad that the tracker isn't been whitewashed for some reason.