Google+ Checkvist community posts 2013-2018

Is there any difference in functionality between the "[link: text|URL]" smart syntax links and "[text](URL)" Markdown-style links? Generated HTML seems to be the same, the only difference is the assistant dialog that pops up when you start typing "[link:", which does not happen for Markdown links.

It used to be that after marking an item complete (Space or Shift+Space), the next item in the list (that took its place) would be selected, but now it is selecting the last item in the list. This seems like a bug.