Best practice for handing bills booked by one subsidiary, but paid out of another subsidiary?

Hi all-

This is my first post on Netsuite.  Hi!  We have a fairly new accounting team and are having issues reconciling interco on Netsuite.  We are missing some elimination entries and in general don't know if things were booked in the best way using Netsuite capabilities.  We have OneWorld so we do have auto elimination.  Here are my questions:

1.  I'm wondering what is everyone doing to record and eliminate intercompany bills - if the expense is for Sub A, but paid from Sub B, what is the best practice for recording this and how is it eliminated?  In the past, we have been booking the bill to expense in Sub A, bill paying that bill from Sub A, and creating an interco entry to debit cash in Sub A and credit cash in Sub B so our bank recs tie.  Is this best practice in NS?  Also, how are you guys eliminating this at the end of the