Maybe it IS a continuation. Amelia and Zelgadis recognise them (…and those two are travelling together), Lina’s famous for destroying Sairaag (twice), and the pirates (and ‘Miss Mermaid’) are absolutely petrified of her when they recognise her.

Ah, well. Still good. Except for ‘Dravoid’. That’s how they translated ‘DRAMATA’. We got that as ‘Dragon SPOOKER’ when Slayers was translated officially here; Dragons Step Past Out Of C(K)lear REvulsion.
Also, Lina was banned from Hell. Go Lina!