MBP having sleep issues: won't sleep by itself & waking up randomly

Lately my Macbook Pro's been having a few sleep issues. I set my energy saver settings so that the display should sleep after 10 minutes and the computer should sleep after 20, however what I often come back to after being away from my computer for a while, is a turned on display with a log in screen. What it looks like is the screen will dim, and then turn back on again. It looks like my MBP refuses to sleep on its own, unless I close the lid or do it from the menu.
I've also had issues with it waking up in the middle of the night. When I went to the terminal and took a look at the wake reason, there appears to be two culpruits: "EC.SleepTimer (SleepTimer)" and "EHC1". I understand the latter might be a USB device or bluetooth, but I've seen it do this when no devices are connected and with my Bluetooth turned off. I've also disabled "Wake for network access" and there's no wake times schedules. I'm pretty frustrated at this point and would really appreciate it if someone could suggest a solution.
Thanks in advance.

You've checked most of the reasons why it wakes. Also go to users>login items and delete any items there.  Here's alittle mre info, hope it helps.
http://support.apple.com/kb/HT3774
All the best

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