you can grab a vertex and move it or if they are part of border edges then just make your border edges more visible
go to Windows > settings/preferences > preferences
then under display click on polygons and then enable highlight border edges and make the edge width 4
this will show you some of the verticies that are overlapping but not joint, namely the ones that are on border edges because you'll see thick edges where the verts aren't merged
that's a "Ch" pronounced as a "K"
Computer skills I should have:
Maya, XSI, Photoshop, AfterEffects, Motion, Illustrator, Flash, Swift3D