my tracking number is RR461384092CN my package will be here 15-30 days after the 27th of April?

Generally, it is. According to the online info, it has been successfully delivered to you, right?
Read this below:
2014-05-12 11:22, Delivered, LEES SUMMIT, MO 64063
2014-05-12 08:06, Out for Delivery, LEES SUMMIT, MO 64081
2014-05-12 07:56, Sorting Complete, LEES SUMMIT, MO 64081
2014-05-12 06:17, Arrival at Unit, LEES SUMMIT, MO 64081
2014-05-11 03:01, Processed through USPS Sort Facility, KANSAS CITY, MO 64121
2014-05-09 20:32, Depart USPS Sort Facility, KANSAS CITY, MO 64121
2014-05-09 18:36, Processed through USPS Sort Facility, KANSAS CITY, MO 64121