It was just brought to my attention that the shipments screen in AR-A does not show the shipments in any particular order.
 
What table does this info come from?
 
Is it suppose to be shown in any particular order (by inv #, by inv date???)

The solution to this is to use the Pervasive Rebuild Utility on BKARINV and BKARHINV.
The trick is to set the options to use key 0 for the Rebuild so that the records get placed
in physical order by Key 0 ( invoice number).

No, you do not need to do any datafile rebuilds on a regular basis.
You should only do them to solve a problem with an index, or to
reduce the size of a datafile that has had many records deleted
from it.  
 
For example, if you archive Work orders, or PO's, you can rebuild
the appropriate files so that the deleted space from the data file
is removed.
 
Data files grow as needed, but do not shrink if records are deleted.
By rebuilding, you are copying only the data records to a new file;
not the deleted space.
 
If you have plenty of hard drive space, it does not mater if you  
shrink these files.  Pervasive uses it's own page allocation scheme
internal to the data files.  If you don't shrink them, then pervasive
does not have to expand the file to add new records; it just uses
the already allocated ( unused ) space.