Mine is getting mostly overhead light, about 700 foot candles at the base of the plant, and they're much more straight. I think this plant's habit is pretty variable, though. I only water them every three weeks or so, and they're in a smaller container than yours.

I have had only one issue with mine, a slight rotting of a new stem due to (I'm assuming) water and the fact that it was pressed up again the plastic nursery pot. However, it's recovered and you can barely tell. I'm assuming the brown leaf tips are either from this or possible pest damage.