Got my DIY liquids through the post. The nic liquid is labelled up as 5.4mg, im guessing that still '54' on the calculators?
You sure it isn't 5.4%? You got a link to the one you bought? Saying that I'm sure it will be 54mg / 5.4% nicotine.
The charger flashing back and forth is normal and the charge will work like normal and be done when it stays green.