The content of Assets.dta can not affect your trading.

But different brokers and accounts do. You can get very different results with leverage 1:100, compared with leverage 1:10, for instance.

Wrong prices are normally a sign that you did something evil with a MT4 connection. Either you edited the assets name conversion function in a wrong way, or you modified the MT4 chart while its EA was live trading. Check the "Remarks" in the manual about what to do and what not to do with the MT4 bridge. -> http://manual.zorro-trader.com/mt4plugin.htm .

Tampering with a live trading chart will be detected by the next version of the MT4 bridge, and will then terminate trading. But not all problems, such as a wrong conversion function, can be detected.