Ok, on them is definitely not on!!! Most kids do stupid things, but by comparison, there are much worse than yours, so I think you don't have to kick yourself too much.
There are so many traditions in Asia, it's impossible to keep up with them nowadays especially with all the elderlies gone. When my dad died many years ago we had many aunty advisors, then when my mum died later my siblings and I just relied on what we remembered and winged most of it. I'm sure she's didn't mind!!