It seems that bw 4 isn’t extracting the sub-codes correctly. Perhaps that isn’t all that surprising as about the only prot. currently using subs is libcrypt so there may not have been much work done on subs reading by the various duping apps lately.
As for The Thing having indications of dpm protection, this is likely. As I recall, that title and a number of others released prior to it (The Thing being the last title released that is readily do-able, to use FP’s “word”) contained both the upgraded sub-code protection scheme (as used for e.g. WCIII) and the dpm scheme.
However, a copy that passes muster so far as the subs are concerned will work for that title without any necessity for bwa/twinpeak patching or gigarec burning with a plex premium as the guard module of the game executable doesn’t incorporate a dpm check.
As for Die Hard: Nakatomi Plaza, the version of securom used pre-dates WCIII and really shouldn’t cause any difficulties if you have any sort of reasonable sub-code reader/writer combo.
(Note though that whilst Lite-on dvds are good subs readers, Lite-on cdrws are not good subs readers though they usually write them OK. Performance with securom new using a Lite-on cdrw as both reader and writer can be quite erratic; i.e. on some systems copies done with one duping app will succeed whilst copies with another that ought to work will fail. In my case, I was always able to copy securom new titles with my old Ltr-24102B as reader/writer with alcohol or with a custom profile with clonecd, copies made with blindwrite were hit or miss (usually worked but sometimes failed) and I was never able to copy any of these titles successfully with cd-mate despite the fact that others had great success with that app.)