If not mistaken, don't take my word as correct, seek professional lawyer for advice if really want to do.

Yes, by law, the ultimate owner of the property is the name written on the 'Geran' or "Strata title".

So the owner of the properties has the right to sell off the properties. If you and the owner has signed a trustee contract or whatever you name it, then it is between you and the owner. Properties sold is not re-claimable. You only can reclaim the money proceed from the properties sold from the owner, so if the owner 'missing in action' then nothing much you can do on the property side, so $$ also with the owner "MIA".

It is very dangerous and risky game to buy on your own money then put others stranger name into it.

Yes, if strate title has not been released, then all are according to S&P agreement signed as the name of owner of the strate title is according to the S&P.