The wise sorceress? She, um... She's tired from the walk there? Yeah, that's it.
The highly trained, noble paladin? Why, of course, the reason he doesn't notice these things, is obviously he saw a cloud that looks like his god, and thought maybe it was a sign.
The excessively observant rogue was thinking about gold or something.
The bard... Bards NEED attention to detail, okay? It's just common sense she's the one who noticed all this stuff.