[OPEN] Basement stairs glitch foundation trim/ make fake wall on ground

Sorry for replying to an old topic but I just bought the vampires pack and noticed this bug myself, Then came across this post while trying to google it. Anyways thanks for the tips on how to workaround these issues!!! By making minor adjustments to basement walls (moving them slightly) was able to fix both missing trim spots and for the stairs all I had to do was change the basement wall height from medium to short which instantly removed the grey wall outside!