Sorry to see you go so quickly. Home Automation is really fun, but unfortunately it is NOT "plug-n-play".
Your problems are likely to be electrical noise and phase coupling issues, which is present in 95% of the home systems. You *may* be able to clear your issues by simply installing a repeater/coupler. Although not the best, the least expensive is the X10, XPCR which can be had from ebay for a less than 20 bucks.