On "av: casual night in the trees" the second outline starts 7.5 pt right
of the first, so its header and left padding covered the first outline's
whole width handle and a press there moved the second outline instead.
OneNote 2010 resolves the same overlap by paint order too, but its width
grip is wider: SizeWE from 15 px inside to 6 px outside the header's
right end, and 6 px either side of the right border along the body.
Grips and text now resolve front to back before any outline's padding,
because OneNote shows the lower outline's border grip through the upper
outline's left padding.

Assisted-by: claude-opus-5