The Amount variable is no integer. Maybe you confused it with Lots?

If LotAmount is 0.1 then 5 Lots is the same as 0.5 Amount.

Oanda lot sizes and other parameters depend on country and platform, so the included asset list could indeed be not suited for your account. Check your asset parameters with Oanda, then adapt your asset list as described on https://manual.zorro-project.com/account.htm. Do NOT use different lots in test and trade mode, this is a recipe for disaster. If in doubt, we also have an asset list setup service.