Just switched my VX3 from Coins to Coin & Jewelry. I gained 4" at least of depth on a Nickle. I wrote down the settings and applied them all to Coin and everything is still the same no depth on Nickle at all. Switched back to Coins and Jewelry and it comes back. Same Coil same Sensitivity 3 Freq everything I can find is the same except the program name. Why is this?