Not sure why the dimmers are acting up, but I suspect they're the trouble.
To troubleshoot, I'd go back to dead-nuts basic: incandescent bulbs and rheostat dimmers, then start adding back your desired components.
As someone else mentioned, many dimmers are electronic now, and many of them require a neutral. Since your setup does not have a neutral at the switch, look for dimmers that say right on the package that they don't need a neutral. Rheostat ones don't of course. Also, LED lights have a driver circuit in them that does not always play nice with some dimmers.
toblies t1_jeee6zt wrote
Reply to 2 Light, 2 switch, 1 Source Wired Wrong by Straight18s
Your wiring is right.
Not sure why the dimmers are acting up, but I suspect they're the trouble.
To troubleshoot, I'd go back to dead-nuts basic: incandescent bulbs and rheostat dimmers, then start adding back your desired components.
As someone else mentioned, many dimmers are electronic now, and many of them require a neutral. Since your setup does not have a neutral at the switch, look for dimmers that say right on the package that they don't need a neutral. Rheostat ones don't of course. Also, LED lights have a driver circuit in them that does not always play nice with some dimmers.