Even though I have changed my default write disk to sd card (There is one )every time I download an app from play store, it downloads it to internal storage. highly annoying. running 6.0. Is this a normal issue? its a big issue for me basically rendering my phone useless. I have considered rooting etc but would rather not. Am I missing something. 
PS I have searched for the 'move to sdcard' option. it seems to have been removed. WHAT IS GOING ON?

An android supporter........