android app doesn't show photos from some cameras

so i have the monument device working seamlessly on laptops. connected to 2 users both sharing. but on my android phone app i can only view photos from 4 cameras instead of the 16 devices it lists. the number of devices is correct and confirmed on my laptop. i can see every photo from every device.

once again i try viewing them on my android phone on the 'browse' page it lists '4 cameras' but when i click on it the next page it lists all 16 devices and tells me how many photos on each device. when i click on any of the devices (except 4 which i can see photos) i get the error message 'nothing to show. maybe it's a good time  to get out and take some photos'. but on the page before it's telling me there are 'x' amount of photos to view !!!!! 

i can see photos from 4 devices but none from the other 12 !! ( i'm presuming because it says only '4 cameras' on the 'browse' page there is something stopping the other 12 being recognised there ???

i might add that the app works fine on the laptop and i can see every photo from every device.

what am i doing wrong ?

tia.