Stemming from this question about the seeming discrepancy between the number of people and the number of first-borns as counted in the beginning of Numbers:
I noticed this problem in my first reading of the text. Why don't the commentaries take note of it? Even if they didn't have an answer, why didn't they at least mention that there was a problem?
(Just to be clear- "the commentaries" means every commentary on the bar ilan responsa site. I would have expected at least one of them to have mentioned this)
I'm assuming this is not an anomaly, so if you know of any other issues that are ignore by all of the classic commentaries, please post them. Also, if you can, please provide a more general explanation as to why so many mefarshim would ignore an issue in addition to a specific answer for this case.