Hi there, from what you are discribing this is not a normal behavior of wdmcex2. I have 2 of them and didn’t have this problems.
I would try a reset from the reset button on the back of your device. If that doesn’t work, maybe a replace.
As for the slow speed, i have posted a solution where i increased my writing speed from 2-3MB/s up to18MB/s. My reading speed via WIFI get up to 28MB
http://community.wd.com/t5/WD-My-Cloud-EX2/What-to-do-to-increase-transfer-speed/m-p/847789#M2566
