It is not common to use a plain black 4" candle or 6"candle or Jumbo candle or vigil light as a Reversing Candle. I mean, you can do it, but you have no "good end" of the candle, like you do in a Double Action Jumbo candle or Reversing Vigil Light, and you have no "good core" of the candle like you do in a black-over-red Reversing Jumbo candle.
Look at the label on the Reversing Oil or the Reversing Vigil light -- see how it informs you that you should dress the oil both ways and carve the name backwards? If you can at least do that, i'd guess you'd be okay -- but without the "other half" or the "inside" of the candles for good things, what you've got sounds to me more like a cursing candle than like an actual reversing candle, despite your use of Reversing Oil.
Reversing Glass-Encased Candle, Fixed