Hi, sorry for a somewhat late reply, we take the ecoinvent methods as they are from ecoinvent, and have carefully prepared the OLCA LCIA methods, therefore both are different, also in terms of the version number of supported methods, and we recommend to use the OLCA LCIA package.
However, we imported the ecoinvent methods from an excel sheet provided by ecoinvent, which could have introduced errors. We will check the flow you report and potential similar flows.