I've never used the edge gel, had a try of their l&p and was very glad I hadn't paid for it. But all that aside, lifting comes down to one of two things, your prep not being thourgh enough or your product coming into contact with the clients skin.
There are some great tutorials on here, I sugest you have a read through and see if there is anything on those that you're not doing/ not been shown how to do and then have a good look at how you apply your product, it's such a fine line between geting a flush finish and your product touching skin that maybe it's just that you need to slow down with your application. Again there are tutorials on here for that too. Also if you go to Angel fingers page you will find a link to her own blog and she has lots of gel work on there.
I hope this all helps hun:hug: