I'm having trouble with my selected Shout "firing" on its own. Ever since I got them, if they are selected, they go off unexpectedly. The only way I can get them to stop is to de-select all shouts.

I’m new to the game and I’m not too far in the storyline (having visited the Greybeards only once), so I'm not sure if this is (1) an integral part of the storyline [where I will eventually gain control], (2) a setup mistake on my part, or (3) a glitch in the software [PC version].

Could someone give me some advice?