Hammer copy problem

[Engineer]

I was making a ctf map, i made one side of map and then i rotated it. When i save it and open it again there is only one primary side. I selected both sides and copied in new file and then saved, but when i saved and opened it again there was nothing... it was empty... Anny suggestions, i remade this map from my previous, unreleased one cause it had too many bugs. And i wont remake it another time...

 

[Altaco]

Just shift+drag it to quickly copy it.

 

[Engineer]

Yeah i know, but that's not the point, it's like saving for this map doesn't even work...
I can save other maps but not this one
I really need your help...

EDIT: I can rotate and save other maps, but when i opent this one it's like i havent made any chages...