Yes, to Catt Mandu! I AM in a semi desert. I use some moss with my coarse bark, but I often only water once a week or even two weeks. My Phals often dry entirely up for some time before I remember to water them and they thrive. My humidity is usually about 20%. They are used to it though, orchids will often adjust to pretty much anything IF it doesn't rot them! and if you give them time. Your latest potting effort looks fine, now just give it time and not too much water and it should be fine. Only if it turns really bad should you change anything.