UMLS errors

I frequently find errors in the UMLS.  The most recent one was this past week (version 2015AB).  The atom ID was 'A23834045';--a MTHSPL atom--and had the title:

 Phenytoin 50 g ORAL TABLET, CHEWABLE

"50 g" (ie 50,000 mg) is probably a fatal dose (for most horses).  This obviously was meant to be "mg".  And if someone were entering this by hand, then this mistake would be a little more acceptable (although in that case, they should have an algorithm that parses the strings and throws out warning signs if it does not appear to be valid.  And why are they doing it by hand?)  I'm not sure that this was hand entered.   I went and downloaded some DailyMed data that these entries are derived from, but this data did not have the error.  (It was released a few days ago, so it may have been corrected since then).  So how did the error make it into UMLS?  Perhaps I'll never know.