Uploader for Images

Hello, I have a script that I found on some wordpress forums that adds a MetaBox to my post edit page in the back end, The Metabox contains an uploader to upload images. The images get stored in wp-content/uploads/year/month/name-of-the-pic.jpg <–like that.
If I upload an image with the same name as an image already in there, the old one gets overwritten with the new one instead of adding a “1” “2” or “3” like name-of-the-pic1.jpg then uploading a new pic with same name should get me name-of-the-pic2.jpg automatically , like wordpress should…..what is happening? Is there a way to make it /year/month/day better? I updated to 3.0.1. Thank You!