Backlog of attacks showing up all of a sudden

1) I haven’t been notified in my log of being attacked in a full day.   All of a sudden I get a backlog of 11 attacks total on my base that were not there before.
2) also many of these attacks look like duplicates, as the same player attacked exactly at the same time.   ie-same time there are two entries saying that “so and so player” attacked twice and I lost 20 trophies both times
3) this happened on both Joe and Cobra, as I had another 8 attacks on Cobra Faction