On the Web Platform, items that are indented are showing up twice. Items show up indented under the outdented item (under the arrow) but also show up again as separate, non-indented items.
That is the correct behaviour for sub-tasks, assuming they have due dates. This way on date based views, you always have tasks that are due shown.
You can have the sub-tasks without a date, and only have the parent with a date, then the parent with subs underneath are all that are shown.
That makes complete sense!
Thank you for the quick response and the easy solution, Brendon.
It's much appreciated.