rm, there is something else is going on there.
We have 3 alerts setup in MOM. One for 5 min, another for 10 and 15 mins.
When 5 min alert is firing i check replication and all is good there and then in the next 5 min i get another alert for 10 min (still all looking good in repl. monitor) and in the next 5 min i get another alert (15 min).
This problem happening for just one particular publication. Another 15 are all looking good.