I've made the fix in this changeset:
https://www.openstreetmap.org/changeset/153830270

I wasn't aware of this address numbering in Boston until you brought this up.  Thanks, I learned something new!  Previously, I was basing my edit on the fact that I wasn't able to find 62 Chatham St. in-person -- but that was some time ago and I haven't been back to this exact spot in at least 1-2 years.