Go to View - Arrange icons by - and choose Name. This should get them back into alphabetical order.
Or you can just click on the title bar "Name" in the right hand panel - each click reverses the sort order.
AMD Radeon Adrenalin release date, new features, compatible graphics cards
Indie publisher Canongate’s top 10 book covers of 2017
New iMac Pro release date, UK price & specs rumours
Tablettes Amazon Fire : quel modèle choisir ?