I had to search old YT videos to find out what I unlocked everyday. If you removed everything why keep this messages or are they still in the game and I can't find it? Also, I can't find two treasure chests, one I nesso and one in cosmodrome.
By the way, I can't complete the broken curse seal since I it doesn't drop the ghost, sparrow and a pulse rifle that was seasoned (I did everything else so there was months spent on that city, lots of chances for it to drop).
You receive those messages because either your light level is high enough to participate in Legendary Lost Sectors or the daily Lost Sectors rotates as part of the Daily Reset.