Blender 4.5/ Lesson 7- Problems w/ Toggling & Missing Vertices in Edit Mode

Hello Again,

I hope someone can help. I’m currently working on the Course Material for Blender Basics: An Intro. to Blender 3D 4.5 LTS/ Section 2: Editing Objects/ Lesson 7: Object Data & Duplicating. The Instructor gave an example in Lesson 7, where he edited the components of three different objects at once from the Add Menu (Shift A), [the Mesh Monkey, Curve Circle, and Grease Pencil Monkey], by toggling between Object and Edit Mode. Example of his Edit Mode results below:

Unfortunately, when I attempted to repeat the example, I got less than desirable results. Shown here–

Somehow, when I switched from Object to Edit Mode, only one of the three objects’ vertices were visible– The other two, the Mesh and Grease Pencil Monkeys, vertices were missing.  I thought it might be my method of selection, but no matter the order, or the number of items I selected in Object Mode, the result was the same– Two of the three objects’ vertices (in this case, the monkey’s) were not accessible in Edit Mode.

I’ll give another example– Here was a switch from Object to Edit Mode without any items being selected–

Again, notice no vertices.  And, yet there was more:

This time I selected all three objects, left to right (although, right to left gave similar result) in Object Mode. When I toggled to Edit Mode this is what happened– Only the Mesh Monkey vertices were visible, but not selected (highlighted), and the other two objects were selected, but had no vertices. Also, I could not deselect the Curve Circle, nor the Grease Pencil Monkey in Edit Mode.  Strangely, when I returned to object mode, all of the objects were selected, and could be deselected in any order, or group.  Shown below—

Of coarse, I could get the vertices for the Mesh Monkey and the Curve Circle individually in Edit Mode, but not in a group.  Also, the Grease Pencil Monkey highlights but does not seem to have vertices, no matter what the Mode, or approach.

Another issue I had was with toggling, itself. Sometimes, the Tab Key would not work.

I thought it might be my computer, but it seems to be virus free, and up-to-date. Then, I thought it was my Blender 4.5, so I uninstalled and reinstalled the program.  I’m really at a loss!  Heck, my Grease Pencil Monkey looked nothing like what the instructor used in his example– Mine was yellow!

Am I doing something wrong, or did I miss something?  Do I have an older program?  Is there a newer, better, bug free version of 4.5 that I am not aware of? Are the settings on my Blender and/ or computer wrong? I would be truly grateful for any advice you could give me. Thank you.