Section 5 says, in part An OrderedCollection MUST be presented consistently in reverse chronological order. This requirement only applies to the collections defined in Section 5, namely: inbox, outbox, followers, following, liked, likes, shares. Collections defined in other vocabularies, including extensions, are not subject to this requirement and can be unordered or ordered by other criteria.
Section 6.11 should read, Federated servers SHOULD perform delivery on all Activities posted to the outbox according to outbox delivery. Servers MAY filter activities for privacy, abuse mitigation, or other reasons.
The note at the end of Section 4.1 should read, Properties containing natural language values, such as name or summary, make use of natural language support defined in ActivityStreams." There is no natural language value for preferredUsername defined in Activity Streams 2.0.
