Gadol > Why would the marital status of an older sister be relevant to a bochur’s interest in whether to date a girl?
you need this to be spelled out?! As we see here, there are a lot of judgy people – in general, and even more so when going thru piles of resumes. So, if someone thinks that a girl should not go out before her sister is married, then seeing such a situation will lead them to toss the resume.
Of course, if it is OK (by some opinions) to fudge a year, then making older sister 1 year younger, and younger sister older will often fix the problem (on paper).
Also, does this apply to twins?