My cloud won't sleep

Your smartctl data does show your drive going into standby – 141 times in the 147 hours it’s been powered on.  Ovarall, that’s about the same rate as mine (roughly once per power-on-hour)

But if the drive is spinning even if it thinks it’s in standby, then my only guess is that there’s a possible firmware bug in the internal HD itself.  

As to the LCCs:  While an average of 4 or 5 LCC’s per power-on-hour isn’t anything to be concerned with, the folks that have higher-than-normal LCC counts seem to have either the 4TB or 3TB version.   I have the 2TB version and my LCC count is about 1 per hour.

In fact, WD just released a utility to modify the firmware settings on certain internal WD RED drives:

http://community.wd.com/t5/News-Announcements/New-Release-WD-Red-SMART-Load-Unload-Utility-1-21-14/m-p/665833#U665833

Maybe there will be a change to the Cloud drive to modify the HD’s firmware.