Those problems don't happen in my MV1C but I'll have a look. Has any other game any issues?The high score issue is known and will be fixed in the next menu update.
Theses issues about Magician Lord and Super Dogde ball were already mentionned few months ago and some users like me have the same issues.
I'm using a CMVS by Analogue Interactive (MV1C - Unibios 3.3) and a Omega CMVS (MV1C - Unibios 3.3). Both are in a perfect working condition (like new)
The only games who i get problem are theses 2 one (Magician Lord & Super Dodge Ball)
All others games works fine for me (Except High Score).
Of course i have also the original MVS games and they working fine and the NeoSD to test (and theses games works perfectly too on the 2 CMVS without any bugs).
Only on the Darksoft MVS Multi Card i have theses issues.
Anothers users has commented about theses games here :
User
@Sp33dFr34k have the same bug like me in Magician Lord (no music in slot 1) :
(note : i have musics for Magician Lord on slot 2, but not on slot 1).
(Sp33dFr34k about magician lord same issue) Games with Issues
(tom5151 about magician lord same issue) Games with Issues
User
@tom5151 have the same bug like me in Super Dodge Ball (black screen on boot (slot 1), but we can hear when we add credits and nothing else):
(note : black screen on any slot, i can see the Neo Geo Logo and hear when add a coin but nothing else).
(tom5151 about Super Dodge Ball same issue) Games with Issues
Theses bugs are real, please fix them

.