ひとつまちがえば => Just (negligence) N3
Ability
に気がつく => to notice; to realize N4
~みこみがたつ => have a good prospect N1
Expected
いつかの ... => Previously N4
Time
~且つ(かつ) => and N1
Line up, list
いつも => always; usually; habitually N5
~つい      => accidentally; unintentionally; by mistake N3
Regret
といえば…が => speaking of, or 'if it were the case that... but... N2
Evaluate
つつ => while; even though; despite ~ N2
いつしか => before one knows N2
Accept, agree
いつか => Since when (Don't know) N4
Time
~の) ならべつだが => if it were ~, it would be different, but... N1
Related, corresponding