Only the first title should be converted to from sort to display order. Subtitles don't influence display order, so don't need to be touched. OK, I now have a subtitle with a comma ('Ring the Bell, Watchman'). If it was the main title I'd have to do something else, but it isn't, so for now...

X:1
T:Staffordshire Hornpipe, The
M:C
L:1/8
S:Flamborough
K:Gmaj
(3DEF |\
G2e2 c2AG | FAd2 B2A2 | G2e2 c2AG | FAd2 DFAF | G2e2 c2AG |
FAd2 B2G2 | cedc BGAF | G2B2 G2 :|\
|: z2 | B2A2 G2F2 | EF (3GFE D2 EF | GFGA BABc |
 d2c2 A2d2 | B2A2 G2F2 | EF (3GFE D2d2 | e2dc BGAF | G2B2 G2 :|