Perhaps you can share the entire series with my institutional email

https://sc.edu/study/colleges_schools/artsandsciences/psychology/our_people/directory/rorden_chris.php

I do think you want to work with the Siemens Research Collaboration Manager to see why each file contains all the timepoints for one slice, rather than all the slices for one timepoint. I have never seen this before and the behavior seems atypical. You may also want to export images directly off the scanner prior to it being touched by other devices to ensure that this modification did not happen at another stage (it does seem like OFFIS_DCMTK_354 touched these files).

You may also want to see if anyone at SNUG has seen this - I do not have local access to XA60, so I am not sure what setting elicited this behavior.
  https://www.snug-discuss.org/