Glyphs,Trap and Poison help [PF]

[Gandolfi Feesh]

Hey guys,

Is a glyph considered a magical trap that can be disarmed??
Would the rogue's Trap Spotter talent allow him to notice the glyphs?

Also on a side note; Drow are immune to magical sleep effects, does this mean they cannot be affected by drow sleep poison?

Thanks