Honestly there is one thing I am afraid with staking. Orphaned blocks.
within a few hours I received coins from 2 orphaned blocks.
I hope this won't happen with 269% blocks coz I will freak out
That will become less of a problem after POW ends, but it may still happen with so many people staking at the same time. There's well over a hundred running wallets right now, and more to come I'm sure.
What I can tell you is if you do unfortunately get an orphaned block, your weight will be restored and the coins you attempted to stake will maintain their age, so you'll lose nothing as long as you do eventually manage to stake them.
Which is the issue that we're going to be running into the most, especially from day 4, as there's just going to be so many coins that it's highly unlikely that they will all be able to stake in a single day.