Does anyone think that the wax residue left behind after a prayer means anything? I always leave my candles on my altar to burn out completely. I use free standing candles. I always get my candles from the same supplier. Normally there is nothing left but a small piece of wick. For the last 3days if I had to give it a name I would call it chaos left in wax.
Many people use candle wax as a tool for divinaiton, it is called ceromancy. It may be that the was is pointing you in a direction and that is why you are getting the same formations, but It is best to check that these are no natural causes for these formations, like surfact texture, cracks, etc.