Oops nevermind, it looks like they are just further down the page. Is this what people were talking about earlier regarding tumblr's "queue" system?
The posts are still there-- go to "archive" and when you hover over, you'll see dates. The building ones are from Feb 1st. Honestly, I think she was just exploring imagery-- she was fixed on urban structures, solitude, etc. from the looks of the images she was collecting. I think this mostly has to do with what she was seeing/experiencing in her travels, but that's just opinion/gut. There could be more significance to that, but it may mean all of her other posts carry potency, too.
As far as queuing posts-- is anyone on here familiar with how tumblr works this way? Her post activity is frequent to say the least, the dates go all the way up to the 18th, and I'm wondering how far ahead it lets you queue and how much content, etc. Unless of course, there's another kind of scenario at play-- in the sense of pure conjecture, could she have been alive up until 2/18 (either having gone completely off radar, or hiding, or nuts)? If foul play is involved, could she have been slain by someone who wanted to speed up decomposition of the body (ala Dahmer, Breaking Bad, acid, all that), and could this attempt have failed, been unsatisfactory (or overtly messy/drawing attention to itself), pressing the killer to dump the body elsewhere (water cistern) with the appearance of heightened decomposition (2 week timeframe)? Curious how bad the water conditions were-- I feel like 2 weeks is too long for the body to not affect the water conditions within the hotel sooner? PURELY conjecture, mind you, just running with it. This is also full of holes-- transporting a rotting body unseen with no traces would be extremely challenging, if not impossible.