1 You didn't bleed the brakes correctly and air got into the system at the master cylinder. You'll need to re-bleed them. Make sure the master cylinder stays filled with fluid at all times while bleeding, if it isn't, you'll be sucking air into the system.
2 ABS pump has air in it. Dealer can cycle the ABS module with a scan tool to get the air out. If it's in the ABS pump, it will be hard for you to do at home.
Explain what you did and maybe we can help you a little better. Without knowing your method we cant pinpoint what you did or didn't do. It should be a simple fix unless you have a psycho jealous girlfriend cutting brake lines or something.