They do take a few cycles to settle down, although they won't "stop" your periods completely. Once you take your placebo pills/the week break you'll have a lighter period than usual.
I've been on Evra for 9 years and occasionally spot if I skip a period. It's normal and will regulate.
If you're majorly concerned or the blood amount is almost like a period, talk to your Dr. Sometimes they don't suit individuals.