Hi KennyGolub welcome to the forums and thanks for posting your concerns.
I have (
wireless cameras functioning and all playing nicely together. I understand your frustration in the initial set-up so if you don't mind tell us which items you have so we can better help you.
For instance I have:
(3) VR36 video recvr (1) for PC (2) for diff TV's
(1) VA11A Video converter USB pluged into PC
(4) Ninja mounts w/xx18A mounted on them
(2) XX16A Instant on camera by themselves
(1) XX11A by itself
(1) XX19A by itself
(1) CM15A controller
I use Home Pro software.
(1) video recv/send kit for extending distance
Win XP Pro
As far as distance and reception these can be interupted by many things i.e. construction of walls, metal studs, florescent lighting, other wireless devices on 2.4 gh. wireless networks, camera antennas set improperly, microwave ovens etc.
as a an example my farthest camera I have is currently 158ft from my video recvr and reception is fine. So lets start with exactly what you are working with. Then we can go on to the set-up What Dave has posted is all correct and I think he is assuming a couple things such as what equipment you are working with, this will help find conflicts also.
Generally it is best to start with (1) camera get it working (not mounted) then move it to one of the other locations and test. That way you know you are working a good camera. Since you have a 2-story house this may make it a little more difficult to adjust the antennas for proper reception going through floors and walls. Hopefully you have someone who can watch the monitor while you adjust the antennas. Hang in there they really do work!