oh thanks your cecound suggestion about "deleting edge/vertex" works great! thanks!

but that merging deosn't works,
pulled them as near together as i could, clicked on the snap magnet tool
than selected the verts and clicked on the "merge vertices" icon

and this is what happens:
it merges to the center where my axis thingy is displayed.
actually i wanted them to merge directly to the verts below/above. if i try to select both (one directly below or directly above so i would have two) verts by holding shift it doesn't work (it's not selecting the other vert so i would have both selected to merge together)

maybe look at the vid i linked at 8:00 - 8:10
he also seems to have a shortcut (hotkey - probably custom setting?)


I'm very thankful for your effort!