Tablet (Card) Weaving

I designed the ivy pattern on the band pictured below using 40 cards. It's woven in 10/2 cotton.

One side of the tablet-woven band

The other side of the tablet-woven band

After I finished weaving it, I set the cards on a table. A couple days later, the stack of cards fell to the floor. I picked them up and put them away. Apparently, I missed one. Logan didn't.