I am not familiar with SAP BW. Based on the above screenshots, it seems that you have created hierarchies for your dimension, right? If that is the case, as stated in the following article, hierarchies and variables/parameters are currently not supported in the Preview version of the SAP BW Connector, but will be supported in the future.
we are facing the same problem at the moment. We can even use the same attribute in one query and it will be shown but not in another query. And we just don't find the difference between the two of them. Could you solve your problem? Do you have a hint for us?
Attributes are not hierarchies. There are just related attributes to the main characteristics. For example in the screen shot, Vendor Dimension has its related country, location and industry attribute.
The sap Hierarchies are already support by PBI, however not the attributes.
Have posted an idea requesting this feature. Anybody needing this, please vote for the feature...