I’m having some difficulty knowing how to cut objects in half by using the loop cut method in order to make the modelings quicker and in hopes to be using the mirror modifier too
So here are the screenshots of the cube as an example when I used the box mode as a selection on the left
When I tried cutting the vertice it only left the end part of the box instead of cutting it in half which is supposed to match with the box selection
If you’re trying to end up with half a cube, you shouldn’t select the center vertices before deleting. So select the 4 vertices on the left, then delete vertices.
OR
select 1 half (like in your example), but when you press delete, choose ‘Faces’
On a new cube, select the 4 verts that will be on the inside when mirrored, x for delete, select face. Or, just select the face in face mode and delete it there.
Going by your images you still have the loop active. Press A, (make sure you have Limited to visable disabled otherwise it will just select the front two) then select the four vertices on left via B (box select )