errors when trying to change prices

[timothyprlngtn]

I began inputing new prices and after putting in about 15 the next time I tried to input a price for a product it changed over to another product that was already priced. I put the cursor back in the correct position tried to change the price and it happened again. Now I cannot input prices. I just bought this the other day. I have tried uninstalling it and reinstalling it and I still have the same problem.