Im confused of how you removed the gmail account and added it back because usually once its added a hard reset is the only way to remove it, care to share how you did it?
I would be glad to look into this issue with your contacts. Did you have more than one gmail account on the device? Since you have already checked gmail online and seen your contacts, Please hard reset the incredible and reload your gmail onto the device and it will reload your contacts back on the device. You may have to redownload some applications back to your device.
Thank you