[Retro pay]

Hi I am new to this forum. I would like to know if someone can help me with this question. I filed a claim for service for back problem in 2009 it got denied, so I appealed it in 2010 it got denied so 2014 I submitted a form 9 and requested a video conference with the BVA judge.  I went before the BVA judge 4/2017 and in 2018 the BVA judge granted my appeal for service connection for lumbar spine going  back to the date 2010.  I have two questions,  1.  The judge did not put on my letter anything about retro back pay ( do the judge have to request this to RO for me to get back pay). and  2.  I submitted this claim in 2009 but in 2017 I reached 100% total and permanent for another service connected disability, so if I do get retro would it be from 2010 up to 2017 when I became 100%.