iPhone 5S still rings for number in blocked list
I have blocked several numbers from known telemarketers, for example (213) 266-7280 called me last Wednesday and I immediately went to the entry in Recents, tapped info, tapped Block This Caller. The number is displayed as the last entry when I go to Settings:Phone:Blocked.
Just now, the phone rang and displayed as the incoming number, (213) 266-7280. And indeed on Recents, there it is, two entries, last Wednesday and today.
Why does the phone permit a blocked number to ring through?
Note this is not the same as the ongoing thread regarding "does it block contacts or just numbers". That is not an issue here, the individual number is definitely blocked and it definitely rings regardless.
iPhone 5s, iOS 9.3.4