I'm not too sad about missing stories from my lists. If they're there that's great, if they're gone, it's fine. I'll eventually remember the best ones.
I'm most upset about the fact that my notes for all the stories I read/am currently reading are gone. I usually reviewed everything I read. Hopefully, the devs can recover them but I have no hope. I guess I have to go back to the old fashioned way of keeping a separate reading journal.
20 chapters just seems so short for a season but I went back to look at Haunted by Desire and the first season was about 10 chapters. I remember that series being really long because of the overall story (all the subsequent seasons plus side stories). I guess PENGUIN just writes tightly structured plotlines so her seasons are shorter than other writers.