Well, Ms. Pixie, it finally did NOT work.
Despite the fact that I had all my stuff for this goal -
https://forums.storm8.com/showthread...v-18-(15-Days) - during whole time of next 5days and 15days goals, - and after all I really GOT hope that everything is fixed for me at least from now on and for future...
Today new 15 started - and I got locked everything back again, including pre-pre-previous stuff from goal mentioned in link above, plus just finished one 15 with wonderful pile of gifts, and I didn't even yet check what about 5days one.
Couple of screens below, but actually i got the message. I'm naive, but not dumb at all. No sense to continue the same experiments hoping for new results. I'm done with this game.