WAL archiving not starting at the beginning

Hi pg devs, fellow pg users

I'm Michael, and this is my first post here.

I asked this question last night:

http://dba.stackexchange.com/questions/45077

which details the problem (or not?) I'm having. The gist of it is that Postgres is not archiving the first WAL segments for my cluster. You'll note that I changed the wal_level from "minimal" to "hot_standby" at the same time as I turned archiving on. I'm not sure if A) that's a no-no (changing the wal_level after a new cluster has started once), B) it's a bug/problem to have my archives starting at the 6th log, despite the first 5 still being in pg_xlog, C) if my switching of wal_level has anything to do with the issue, and D) if I need to start over with a fresh database or something, in order to remedy the issue.

Thanks
Michael