@Kiki-Inuyoshyy I'm sorry... I was probably not clear on this... I didn't mean for you to use the new game to play (as you are correct, your sim would loose social and other items, so you would want to carefully research and decide what was lost and how to retain what'a most important if you tried that route...
My intend for the new game was to use it to go to that lot you want to move into and save the lot to the gallery, go to your current game and download the one that you saved to replace the one that is being glitchy. Did you do the game repair? You also have no CC?
Hmmm... if apartments cannot be saved you could also try seeing if clearing the cache helps? Please refer to this article: http://www.carls-sims-4-guide.com/help/cache.php
Curious, did you try this move-in with this family on a different lot to see if the issue is only happening in this particular lot?