They may be flipped the wrong way. Also some of their contacts are defective as well which will cause them to not fit. My main reason for contacts bothering me is when they arent flipped the right way.

I've heard that if the diameter isn't right, the contacts will move around when you blink. Some contact lens sites you can specify the diameter measurements for your eyes and some you can't. I don't believe TTDeye gives you the option to choose the correct measurement. I hope this helps answer your question!