It's puzzling. My Scottish percentage has gone up to 49%, Irish 27% (similar) and English 14% (down). I have 4 English g-grandparents (with paper trail and DNA matches all firmly in England for earlier generations), one g-granddfather from Mayo and 2 g-grandparents from Antrim (probably included in the "Scottish" element) plus one "unknown", so it doesn't really add up for me.
(My English families are from Cheshire, Staffordshire, Shropshire and Somerset, so hardly the Scottish borders!) Apart from that, I have 6% Norwegian, 2% Swedish/Danish and 2% Welsh....
MyFamilyTreeDNA gives 53% England/Scotland/Wales, 44% Ireland and 4% Scandinavia.