When text is styled with a paragraph style that has Auto hyphenation on in the
'Text Flow' tab 
then hyphenating Tools -> Language->Hyphenate
The 'Remove' button doesn't work, it leaves the word hyphenated and moves on.
You cannot remove individual hyphenation with Auto on, whereas you can override
the position.
When using the Left/Right arrows for choosing alternate hyphenation positions,
and click 'Hyphenate', it will change the hyphenation position but won't move on
as it does when Auto is off. If you click the arrow back to how it was and click
'Hyphenate' again, it won't change again.
'Next' works the same as 'Hyphenate', in that it leaves it hyphenated as per the
Auto setting