Recent premium user after using evernote free for 4 years and just ran into this issue where I used the evernote app for OSX and created a fairly lengthy note full of bulleted lists with varying degrees of indentation in sub-headings. All looked good and formatted to my liking, but as soon as I opened this note in the web browser (from a Linux machine where there is no evernote app) the whole indentation levels were lost.
It went from something like:
foo
bar
baz
za
za
gabor
to
foo
bar
baz
za