Thanks for the bug reports @Enigma644
It is correct that the artifacts are not being properly received in MuseLab. This is something we are looking to fix in the next release of Muse Direct.
Regarding the data that is being saved, the auxilliary channels are being saved from what I see. If I use preset 20 with a Muse 2016 headband, all 5 channels are present in the recorded file. Could you please send me a file that you recorded with preset 20 that has this issue?
The blank EEG lines are actually the artifact, band power data (absolute, relative and score), is_good, HSI and gyro data. Muse-player is not converting the values correctly. If you read the .muse file with the LibMuse SDK, you can see the actual values.