Reorder the variants of a product already inserted

I need to reorder the variants of a product already inserted in the store but the REORDER VARIANTS 
button does not appear

See the “6 dots” next to the variants under Options, use them to drag the variants into order. Or click Edit on the right of those variants and do the same for the sizes etc

doesn’t work. the order doesn’t change

Yes it does I use it 5 days a week, many times

May you tell me what I am doing wrong? I reorder them in the 6 dots as you mentioned, and then press done, and then press save.