basic controls don't work

[Spngl]

Hi!
I read on the wiki that you can zoom out by rolling the mouse wheel, or if you dont have a mouse wheel (like me) by pressing CTRL + the right-clic button and moving the mouse.
It works! But when i release CTRL, i gets back to a very close view.

Also, sometimes i can go up and down a NPC talking window, and sometimes i can't. Like right now, i can't buy red potions because the NPC's selling window is stucked downward and the red potion is an upper item that doesn't appear in the window.