So is there no chance of this happening?

Regardless of what anyone else says, people will say things to sound that they're smart, you don't have a 100% definite answer unless it's from a developer+

Your best bet would be to contact one of them.

I paid a little more attention to my problem today.  Regardless whether I set it to defense or strength, if I log out, it sets my combat to attack.

Edited to add: It still shows the option, either defense or strength, as selected, even though the xp is going towards attack.

It also resets my Music, from off (which I prefer) to on.

I'm pretty sure I was thieving and I accidentally clicked attack on a man with an axe equipped, and it gave me defense exp a few times. I'm pretty sure  I had aggressive selected, like I always do. Maybe the game selects defense but doesn't display it when you switch between certain weapons?

Im 3 defence from glitches please can you reset mine aswell please :)