In the Australian market, Breaking Bad Season 5 (16 episodes) was actually released as two separate DVDs of 8 episodes each.
Currently the Core includes both DVDs but treats them as if theyre the same with 16 episodes each.
Instead, the first 8 episodes (1-8) are found on the DVD called “Breaking Bad: Season 5 - The Fifth Season”. (9317731097898).
The final 8 episodes (9-16) are found on the DVD called “Breaking Bad: Season 5 - The Final Season”. (9317731102592).
I physically own both these DVDs so can verify the above information is correct.