Amanda,
I think the important diagram in that sequence is the bottom right,shown from above.That is an idealized view of what you want to see around year 2-3 if bush form is your goal.The important thing at this stage IMO is symmetry in your primary scaffolding branches.There's nothing wrong with a V shape because you can fill the space in your secondary scaffolding.Here's one I've been fussing with this year.
View from above.
This structure will be pruned once more,creating a permanent 8 branch scaffolding,filling those voids.It's on those 8 branches that all the fruiting will take place,this lower structure will be shaded out by next year.
You're never going to get perfection,these are fruit tree's,not bonsai.I think photo 2 you take out the apical center growth and you're good to go.Photo 4 already has good structure,I'd remove the branch growing back into the center and tighten up the secondary scaffolding once you see branching going into the area's you want to fill.