|First I would recommend getting an electrical tester and test that the outlet you are plugging into does not have an error in it's wiring or a faulty ground. If someone changed the outlet or did other wiring in the house you could have a reversal between line and neutral or an improper or missing ground connection. A lamp or a power drill will not really care, but this condition is a hazard and your power supply can be affected by it (it might just cut out and probably is fine). You can get a simple tester at any electrical supply store or hardware store that just plugs in and will show you with colored LED's if you have a problem. If you do have a problem, you may want to get an electrician to fix it right.|
Your power strip should have a 15 Amp circuit breaker should you overload it, but 2 computers, 2 monitors, printer, etc. will not come close to overloading it though you can check the reset button if it has one. Power strips and their circuit breakers do go bad though so you can try using a different one on a different circuit and you should however be using a surge protected power strip to offer some protection for your electronics.
You have to be a little bit crazy to keep you from going insane.