Lightmass problem

Hi,

I need some help.

I get these problems when baking the lightmass. How can I get the shadows looking better?
I tried modifying the Lightmass setting in World Settings, however, it didn’t make it look that better.

I also get a red light at a corner where I don’t have anything there. There is no light hitting it and I don’t have a red light anywhere in the scene.

Cheers,

Raz.