Hello,
I'm really sorry to hear rude words like these.
But let me prove you that this is not a fault of Kentico.
A whole issue is related to the inheritance and settings of your page template as you can see also in the Developers Guide:
Visual inheritance.
But there is a chance to restore your previous work if you have versioning enabled.
If we are talking about "page template" you need to check the "versions" tab of your page template. You can do so in
CMS Desk -> Content -> Select your document -> Properties -> Template -> Edit tamplate properties -> versions.
However, first of all, you should check if the versioning settings are correct for your page templates. It could simply happen that
A.)
Object versioning settings for your web siteCMS Site Manager -> Versioning & synchronization -> Object versioning -> Enable objects versioning
B.)
"Page templates" setting CMS Site Manager -> Versioning & synchronization -> Object versioning -> Page templatesBest Regards,
Martin Danko