Calipers are leaking?

I changed my rear brake pads, rotors and calipers after having taken it somewhere to have the pads changed, and right after the rear brakes started to remain compressed from time to time, so much so that the pads were gone in a matter of weeks. So instead of taking the easy way out and possibly getting it messed up more I just decided to do it myself, considering I have always changed my front pads and rotors on all my previous vehicles.

So, upon finishing the task I noticed first that it was that brake fluid was leaking from the driver-side rear caliper where it connects to the hose. After bleeding the brakes and not coming up with another option I took the caliper back and exchanged it. That worked. The leaking stopped but then I noticed the driver-side brake wont engage and the passenger side feels as though it won't completely release, mostly will but not completely. When I plan on re-bleeding all brakes, but if that doesn't work, is there anything else I can try before I give in and search around for a reliable mechanic.