a.fig

Hi everyone! I just started my candle making journey and was wondering if any of you could help me with the issues I've had so far and for which I couldn't find an answer on the interwebs. I've used Kerasoy container blend wax for my first batch of candles, have made 3 different scents using essential oils and have used TRC pre-wax wicks of 2 different sizes. I let the candles cure for 48 hours as recommended for Kerasoy wax and notices straight away that the candles were all solidifying with a raised bump around the wick. Not a hole or a crack as I read in many 'soy candle problems' posts, just a little 'mountain' formed around the week. After the 48 hours I lit up the first candle and straight away the surfaced cracked around the week and bubbles kept coming out of it. The candle has been burning for 30mins now, there is definitely a crack but the bubbles have stopped and there is no tunneling so far (I think). Could any more-experienced candle makers help me figure out what I've done wrong and how to avoid it? Many thanks!