doubles with domyblue

we use a 220mm film so I do the first layer with the red scale technique doing also some double exposure with an Agfa Clack then I send the film to domyblue that's living in China ( )and she shoot the film on the right side using a Diana+ F but unfortunately her shots are almost invisible! then the lab develope the film in E6 instead of c41....what we can say more?