Hi Melanie,
This indicates that the company address formats might have got changed post upgrading to SP14/15.
Then in that case, I would suggest you to synchronize the company details (address) from GRC to R3 system. Company address must be identical in all the systems.
You can do a quick check against the entries with SUCOMP in R3 system for all the existing companies with the entries available in GRC system.
Hope this works out.
Regards,
Ameet