I find the autoclose works well in two different mods.
When starting from scratch with auto on as I type the close tag is added and I can type what is needed between the open and close as I go.
Currently when editing, I have it turned off and when I add a new tag, I place the cursor in the desired place for the close tag and just type </ and the correct closing tag is auto-completed.
Some times I am surprised when I have included coding that forces closed a block and the auto complete closes something I don't expect. But it has always been correct.
Then again you could be talking about when selecting html tags from the tool bar, which is a different issue.
Say what you will about Sisyphus. He always has work.