Arrested, charged with offence (rape) which is Crown Court only; sent to Crown Court not for trial but a directions hearing to arrange what witnesses need be called , time to be allocated,date for trial etc Rearrested and charged on other matters which are conveniently dealt with at Crown Court, therefore , if possible, tack those onto the same hearing directions. They may end up on the same indictment if part of a pattern or related.
That seems to be what is happening.
What is ridiculous is arresting someone and then bailing forever and a day while you try to find the evidence to support a charge.