DNS mismatch

[bOnK]

FYI
For the last couple of weeks, the DNS slave servers 
[abc].auth-ns.sonic.net seem to always be behind ns.hyperreal.org.

Wed Sep 14 12:08:37 UTC 2016
dig 2.3.3.updates.spamassassin.org. txt +short @ns.hyperreal.org.
"1760494"
dig 2.3.3.updates.spamassassin.org. txt +short @a.auth-ns.sonic.net.
"1760316"
dig 2.3.3.updates.spamassassin.org. txt +short @b.auth-ns.sonic.net.
"1760316"
dig 2.3.3.updates.spamassassin.org. txt +short @c.auth-ns.sonic.net.
"1760316"

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bOnK