Hey,
Maybe it's just her :-/ odd one!
With the eye with more lashes, try to do about 70% of lashes - you don't want to thicken up to much and the other one look bare.
On the eye with less lashes, fan/stack some lashes and this will make it look like she has more.
This is where volume lashes work wonders!! X
Thank you for you're reply this is a reason I would love to do volume training.. I have only been lashing for about 6 months so I don't know how experienced you need to be to do the training. What would you recommend? X