I checked your link to the hunter site and randomly zoomed into some cover images and they all seem to be labeled HUNTC (not -D) for the ones I spot checked.
For the numbering, it's possible that the new JAV laws that require 3 month hold between filming and release screws up the numbering order vs the release order. Like a production will be assigned a number before filming, but then the delay ends up with higher numbers being released before lower numbers due to different filming or editing dates plus the 3 month wait period.
![P5PE9ff.png P5PE9ff.png](https://www.akiba-online.com/data/attachments/3426/3426340-9bd24342109884d9f2d8a09fd426e9c5.jpg)
![vpmClBR.png vpmClBR.png](https://www.akiba-online.com/data/attachments/3426/3426341-bd01584f7827feef222fdb200fcfc7c1.jpg)
![k99OoaT.png k99OoaT.png](https://www.akiba-online.com/data/attachments/3426/3426342-1d86dd939a538635aaf9c9e09b2c790b.jpg)
Here's what I've been looking at but now that I zoom in enough I realize I saw it wrong. For some reason these looked like D to me.
![tA3BCpu.png tA3BCpu.png](https://www.akiba-online.com/data/attachments/3426/3426343-3041ea01c5567d1db82cc49d62c5a17b.jpg)