Dear Steve - great your tumours are shrinking. Sorry I can't give you any info re the bleeding, but if you are not getting answers here, may I recommend you ask again on kidney-onc (which you can join on http://cancerguide.org/kofaq/ ) as there is a vast collection of experience, information and advice from a host of RCC patients, carers and survivors.
I'm sure your question will get an answer there.
All the very best - Julie.