Flood on Big Blue mini focus light??

[kenns]

I purchase a Big Blue mini focus light recently and I love it....for the two times I got to use it. Unfortunately, it flooded. I have big ol' dry gloves but was careful only to turn the bezel the amount necessary to turn it off. The catch was that the light itself is loose in the holder (a piece of rubber tire tube will help keep it in place). So I may have caused the flood inadvertently. It doesn't seem that Big Blue will warrant it...I like it enough to buy another but it will stay on the entire dive. So....two questions....

1. how much turning should it be able to handle (even with double o-rings)?
2. has anyone else experienced this problem? Wouldn't a on/off switch be a better design for underwater?

Thanks
Kerry