but reeeling off a list of your computing abilities, and reminding the world's biggest seller of books what makes a business viable is hardly likely to endear you to the customer services staff.
Before posting this response I ran a test. I logged into the UK Amazon site and made my wish list searchable. I got my wife to do the same to her list, and my son and daughter did it to theirs - neither of them live at home. All of us were able to search for each others' lists immediately, without any trouble at all.
Amazon UK is one of the busiest sites in Europe - even more so at this time of year - and you can bet your life that if there was something wrong with the site they would be onto it like a flash - they have people monitoring performance 24 hours a day. I'm not sor a moment suggesting that you - or your son-in-law or "others I know" have done anything wrong, but I'm sure you'll agree it is a little odd that four of us, in three different locations, and from four different computers have just done the job in about ten minutes.
Maybe, just maybe, you should try once more.
Clear your cookies, clear your cache, login to your account on the site, make your wish list searchable, save the changes, logout, and then clear your cookies again. Now visit the site and search for your email address. If that doesn't produce your wish list there is certainly something most odd going on.