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1,075 Posts
No. That's the cause of the first problem. Replace one dimmer with a standard 3-way switch.
As for the second problem. you need to investigate the wiring you changed and try your best to trace what goes where. To even start this process you need something to actually measure or detect voltage. For troubleshooting, a non-contact voltage detector is useless at best and more realistically will mislead you every time. It doesn't need to be expensive or complex. Even a $5 neon voltage light is infinitely more useful to you than a NCVT.
