Led turn lights wont operate corretly

Hi, I just fitted led turn signals in the front and rear. Also changed the relay and got the normal pace on the blinking. But the blinkers in the back both blinks at the same time. A little differently though, but they still blink. Blinker to the right. Then the right blinker blinks, and the left one blinks a little dimmer. Blinker to the left. The left blinker blinks, and the right one blinks a little dimmer. Can this problem be due to wiring not being isolated properly. Ie. electricity leak from one wire to the other. Since the led bulbs use a lot less power I mean. Any theory would be greatly appreciated.