Yes. It is normal that the PEMF is so weak. It can output around 1 Gauss if you connect the coil over one Output OR over the "boosted" Output (no difference between it because the current stays the same).
This mentioned 1 Gauss is calculated, not measured. (Max. current ca. 120mA, the coil has got 23 turns). If you want more strength then you can:
A) Connect both Outputs in parallel and drive the coil with the same output wave / amplitude and phase. This doubles the current and so it doubles the magnetic field.
B) Connect a Amplifier between the Output of the XM generator and the PEMF coil as shown here: https://www.spooky2.com/forums/viewtopic.php?f=11&t=7942
C) Build yourself a coil that got more turns and/or add a ferrite core to the inside of the coil. (use a ferrite core because an iron core would reduce the max. frequency that the coil can deliver).
For more details, please check the link: