Ditto Danielle283...I've had mine in for 10 months and I still get spotting every month. Sometimes it'll only last for 2-3 days, other time it's up to 10 days! Not enough that I really even need a panty liner, but it's still there all the same.
The last time I had the Mirena (two babies ago) my periods completely disappeared after the third month. So I gues both can be "normal".
Trish~mama to Kaelie 5/03, Amelia 12/13, and someone new coming 11/15, surro mama to Aidan 2/08 & Ellyss 6/09,