Excel uses your local separation character. Make sure in your PC regional settings that it's a comma, and the decimal is a point, otherwise Excel can not read standard CSV files. Zorro accepts both commas or semicolons.

For the symbol issue, check which symbols your broker requires. Slashes are automatically removed by the API plugin. If you use MT4, make also sure that you've assigned the Zorro EA to a EUR/USD chart. Otherwise the asset name is not automatically converted. You can see in the Experts log how your asset name is translated, so it should not be difficult to find the reason of the problem.