I don't know if it is a real bug or an recent update in the swap page, so forgive me if I am wrong.
There is a "edit my collection" option in the swap page and it is an excellent idea, but it shows the new input method even when you choose the old management style in the profile.
Even choosing the old style, I tried to use the new method in swaps, but the grade and the comments vanished when I access the coin page after.