It seems to be a complicated case & one that I havent come across earlier. Anyway, maybe you could try the following after taking a precautionary backup:
1. Filter (list) out the members that were created after the backup. You could try this using DSPFD *MBR & dump the same to an outfile which you could query.
2. Once this is done, copy these members to another temp file as a precautionary measure.
3. Clear (delete) these members from the original file.
4. Then apply the journal changes from the point of the last backup.
Hope this works….Good luck!