I need some help. My wife and I recently bought a home and we're working on the standard improvements. When we paint a room we also go in and change the outlets and switches. I did this in a bedroom and bathroom and I changed out them all and they worked fine (checked them all as I went along). However, when I got to the GFCI major problems developed.

There are two cables coming into the wall box where the GFCI is located. The old GFCI had the two hot and two neutrals wired into where the line wires would be landed. When I replaced the GFCI I landed one set on the line terminals and one set on the load terminals. The outlet will not work (GFCI will not reset) and worse none of the other outlets on the circuit will work either. I reversed the wiring and am sure I have the correct wires landed on the line terminals and the correct on the load.

The only way I can get the GFCI to reset and all the outlets on the circuit to work are to land both pair of cables on the line terminals. This doesn't seem safe to me. Anyone have any advice on what to check? Is it safe and can I operate the outlet and circuit in this manner.

Thanks for the help.