Depending on how many clients you have found this it could be clients natural lash line as some clients have lashes that grow across each other and if you apply extensions on top of those they will obviously follow the same direction.
Other than that, make sure you wait till the adhesive has fully set before letting go of the extension to make sure it stays the way you want it too, however make sure you are working with the correct length and curl as every client is different and just because they want to have super curly lashes doesnt mean they can have them as you have to make sure that you can achieve a good bond throughout the lash.
hth :hug: