From what I see, the leverage looks ok in your files, but for instance the commission is not ok - Oanda has no commission. If you think the leverage is wrong, please check with Oanda support.

The broker API does not deliver all parameters. If a parameter is not available, it is taken from the current asset list. That happened with the commissions when you download data from Oanda. So set them to zero before using that file. The new Oanda API will also not provide rollover, so you must enter it manually in the Assets.csv after downloading the asset data.