You’ve apparently never worked with 1950-1960’s-style typewriters if you would assert that vertical alignment is somehow dispositive of the forgery issue.
In typewriters of the time, the largest mass of the typewriter body, to which the character blades are attached, generally moves up and down from pressing on the SHIFT button (and/or holding it, or clicking the CAPS LOCK). Up-and-down motion is thus a normal function of such typewriters and could easily obscure vertical alignment variations as it might correlate to an issue of forgery (which to me seems specious to begin with, but that may be another matter) through less-than-completely-accurate typist technique. To the extent a typist might “ride” the SHIFT button, vertical alignment could vary without any nefarious or forgery intentions ever being involved.
On early typewriters, pressing the SHIFT button took a great deal of force, but over time, and by the 1960s, there were much lighter mechanisms that did not require nearly as much force to be applied to the SHIFT key. An increasingly-lighter main body would only exacerbate a potential vertical alignment problem among typists that were doing their typing with less than optimal technique.
A typical typewriter from that era displays only "monospaced" characters. To appreciate what I am trying to explain, open up an MS Word document and type a long paragraph. Then compare the horizontal alignment of characters by changing the font assignment between "monospaced" (Courier, or Lucida) and a "proportional" font (Helvetica). When in "Courier", scan your finger down the page and see that the characters form a fixed column of characters. This is what typewriters do, and "Courier" was created to simulate monospaced typewriters.
As I said, paste the birth certificate into a Powerpoint or other drafting/drawing program. Select a line-tool and draw a long, perfectly vertical line on top of the BC, so that you can sweep that vertical line left/right across the document. Pick a character from one of the lines of text in the form, and adjust the vertical line you just drew to the edge (or center) of that character. Follow your eye down the vertical line. The characters from each line of the form's text should just touch (or be centered) on your drawn vertical line, by the same amount as the character you chose to calibrate on. Along your vertical line, a "column" of Characters perfectly touching your drawn vertical line "should" appear.
You will see that in many places on Obama's BC that they DON'T align to your vertical line. It means the text, or portions of text were pasted by someone who didn't know what they were doing.
Do I need to make myself any clearer? Let me know that you understand, because you are confusing the readership.