I tried to upload a screenshot but it said file too big. What I did find is on the blog it refers to bags as leather and then on the app it says cotton. Case in point: look up the romancing Minnie collection, this was the example I found. So yes I am thinking the app has to be wrong. I have four Disney dooney collection pieces. The b&b was labeled as leather (bought it in December/January). The dumbo bags are the same material, dont know what it was labeled because I didn't save the screenshot. But the flower and garden I bought in march is labeled as cotton and it is the same material as the other three pieces.
I think the app is wrong. Hopefully.