I do the same thing. Each fall when i was younger, i used to spend hours sitting on the floor sorting out the new school supplies between me and my younger siblings, and i used to have meltdowns when somebody even got near me. Exposing yourself to the problem by putting them away "incorrectly" and then being open about how u felt about it is awesome asf tho. Making "mistakes" and leaving them will make stress lessen over time, don't forget :)
My sister really struggles with this with the dishwasher! (We both have OCD, what luck!!! And totally different themes atm lol) She has gotten much better because of doing it “incorrectly”, but she used to have total meltdowns when anyone got close and yelling matches with my mom about it, too. I’m sorry you’re going through that, but I totally agree with PayNoMind!! It’s friccin awesome that you did it wrong and observed how it made you feel. You can do this!!!