Are you saying you have blogger set to auto ping
PLUS you are using Ping-O-Matic PLUS ipings?
Thats too much. All those service for instance probably ping technorati and Yahoo and many of the other majors. If you use all 3 services above then you are pinging everyone 3 times. So it could look spammy and I dont know if they'd block you or what - but it's just not good to over ping.
I have wodpress set NOT to autoping because I sometimes have changes after I publish and see how my title fits. May even decide after looking at the finished post that I want to target different keywords in the post. Id it autopings then it will ping with the 1st title before changes are made.
After I get it the way I want it I use
www.pingoat.com because it pings the most places. After you set up pingoat the 1st time, then you just bookmark it and don't have to fill the forms out again.