I think I see your problem if your intent is to align at the leader extension line, correct? It doesn't work like that, never has.
The align tool works on the text only, left justification.
In your sample, see for yourself: select "3/4 adjustable" for one text, and the "3/4" tp" for another, notice where the alignment too place.
Might I suggest something? Instead of writing very long single lines of notes and very random hard-returns, you consider assigning a stock width you all the mleader text? Pick a size (start at 15"-18" and respace the notes vertically) plus left justify all of your text so they look more typical, then MleaderAlign's actions won't look so dramatic on the right-side that seems to be of concern to you visually (add a word or two to widen them if needed, for example 3/4" top "something"). Especially since on the right side of your detail you show no interest in aligning the text or dimensions on that side.
