there are several problems.
first, a normal vertical redstone signal fails to transfer. this works fine in singleplayer and has worked in blacraft and other servers afaik. when i destroy it and replace it, the glitch goes away for that torch only -- i don't want to rebuild half the farm to fix everything.
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second, i tried to replicate the glitch. i accidentally mined instead of right-clicking the lever. about 800 levers appeared in it's place but the original lever did not go away. these levers are normal, do not dissapear, and are placeable/usable in every aspect afaik.
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the first glitch is rather serious. the second is less so, as there are no good uses for massive numbers of levers atm.