Newbie: Need Pushpins to cluster...not overlap.

I know this must be an easy one. And probably user error. Sorry.

But when I plot pushpins on zips they stack instead of forming a nice cluster.

Instead of knowing that there are three customers in a zip code by seeing three push pins in a cluster, I see three pushpins stacked exactly on top of each other. No good for understanding where your customer base is.

Please take pity and enlighten me.
Thx.
-Jody

It puts the pins where they are suppose to be, if all the locations are in the same location they will all be put there. I suggest you use colors instead (ie: the darker the spot the more customers there are).

You could also put somthing in the label to indicate how many pins are at the location