Windows 10: Tiles on start page resize and rearrange on reboot

I searched for this but nothing turned up. The tiles I've put on the start page for various apps (all resized to small) and arranged in groups are rearranging themselves randomly and resizing to medium each time I reboot. I can't find any reason for this. Also, is it possible to start more than one app at a time using the tiles? I've tried searching here and using Google but nothing at all comes up. Could be poor search keywords but any suggestions would be gratefully received. It's a clean install after upgrading.

:)

 

Start Menu

I got all my tiles the way I like 'em on the Start Menu, and the latest update shrunk the space available. I've had to shrink and rearrange the tiles as a consequence. Please restore the option of resizing the Start Page to as wide and tall as the user
desires. Thank you.

 

Win 10 Start button

Since the upgrade to Win 10 I was used to search for programs in the start-button by just typing the program's name. This doesn't work any more, after the last update? (KB3080333)

Before I had problems that my arranged and resized tiles were rearranged and partly resized by Windows after an update!

How can this be fixed? (except installing Linux)

 

After several reboots it's just stopped doing it. Again, no apparent reason.