I have three identical products listed on Amazon. They all are credit size plastic cards with information on them (one for black jack strategy, one for poker info, and the last one is a flash card with the phonetic/NATO alphabet).

The first two I listed and started selling 2-4 months ago has no variable closing fees, while the new one I just created has a variable closing fee of $1.80 USD. Products 1 and 2 are in the same category: Game Table accessories. The last one is this category : Office Products-Office & School Supplies-Paper-Cards & Card Stock-Index Cards

From my understanding, there should be no variable closing fee for any of these categories. Here's the relevant description:

"Sellers also pay a closing fee of CAD $1.80 per media item that is sold. Media categories are Books, DVD, Music, Software & Computer/Video Games, Video, Video Game Consoles, and Video Game Accessories."

Can anyone help me understand why there is a variable closing fee for my new product, which doesn't seem to fall into the listed media categories with a fee? Why there is a fee for one product and not the other when they are all the same except whats printed on them? Plus they are not Media item, they are all physical.

For your information, both are little plastic cards with informations on it. Identical in every way except for whats printed on them.

Thank you for your assistance!