Disappearing Brake. Fluid sortof

[HPilot]

Hi
I have a 2010 Vibe. I redid the driver side rear brake parts(all). When I went to bleed the brake line, I topped off the fluid in the master brake cylinder. After pumping the brake pedal a few times I would again top up the master brake cylinder. The level in the the master brake cylinder seems to go down way more that what I was getting in the discharge hose on the rear brake. There did not appear to be any signs of any leaks at either the master brake cylinder or abs. So I placed a large piece of cardboard under the car for the night. Next morning there was a large puddle of brake fluid on the cardboard. I took out my small camera a took several pictures of the area in question. Nothing to indicate where the oil was coming from. All the brake fluid lines to master brake cylinder and abs were clean and fluid free.
Any suggestions?

[jolt]

First question, is this a base model, or GT, or AWD? The rear brake systems are different on these models. Next, why just the drivers side? Only replacing brakes on one side can cause the car to pull to one side or the other. Is it brake fluid or oil? You said oil on the card board. Did you spill brake fluid when you were adding to the master cylinder? When you say (all) parts, what does that mean? Did you replace, or rebuild the caliper?

Brake are very, very important safety item as you not only endanger yourself, but everyone else on the road too. Do not drive car until it is fixed.