Than you info.
Just notice for this:
Limit is working only for main records for zone
Refresh, Retry ,Expire, Minimum, TTL
Not working for individual records inside zone, you can create any A record with 1 second
Also translation string may be
"You have exceeded minimal interval for record" instead of "Min. Retry time is 60 seconds."
And also - it will be really helpfull if limit works just for users and administrator is able to set any kind of record anywhere...