I've just realized that new colors don't stay in the shop if you don't buy them

I'm gonna scream. I've been skipping the new colors items every day thinking they would show up in the shop for me to buy at a later date. Just like on the 3DS version.

NOPE! That's why all my clothes only have one color option!!! I want to yell right now because of all the clothing options I don't have after nearly 3 weeks of playing this game daily.