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.

enter image description here

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?

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