Losing all custom line heights when .story is closed and reopened

I adjusted my line heights for certain text boxes in the line spacing options as a way to tweak my layout. I was dismayed to discover after spending a lot of time tweaking my layouts that when I reopen my .story file, these changes have all been lost, totally scrambling the layout. I've submitted a help ticket, but I'm wondering if anyone else may have run across this bug? See attached screen shots of page displayed on Articulate Review page, vs. the page in .story file after it was saved, closed, and reopened. 

Thanks,

Lon