Different candle positions in coins with same OCHL values Why do candles sometimes have different positions and sizes even when the open-close-high-low are all of the same value?

For instance in one coin I saw: DigitalNote(XDN) the price has been consistent at 0.00000030 for a while, yet the candles are of different sizes.  



In this image, the last two candles both have O=0.00000030 C=0.0000030 H=0.0000030 L=0.0000030

Yet somehow the candles are of different sizes. 

What's going on?
Keep in mind exchange data might not be reliable in all instances due to the way they have it implemented. Your best bet is to see if the exchange can provide a data field of historic prices and then plot it yourself using excel.