Confused about logical logs

I'm confused. I am using 7.20.UC2 under Solaris 2.5. I have the server set up to replicate to another 7.20.UC2 dataserver. The confusion I have is that the logical logs stay in "U-B----" mode all the time. All but one of them shows 100% full. If I do a "onmode -l" it kicks over to another log just fine. If I do it 5 times, I have 5 logs that have a couple of pages in use, all in the "U-B----" mode. None of my logs are free. One of them is in "U---C-L" mode, as I would expect. My LTAPEDEV is /dev/null. Everything seems to work the way it is supposed to except for oncockpit, but it doesn't like replication anyhow. Is this a problem? Why are none of the logs ever being freed? There are no long transactions (indeed, I've bounced the dataserver a couple of times and there's nobody even connected). Any info would be greatly appreciated. Thanks in advance. -- scott dunbar g-bar limited partnership dunbar@hotjoe.com (home) chicago, il, usa scott@gbar.com (work) 312 362 4479