Could you send some detailed info about your setup (os version, what sort of burner you have, how many burners, what sort of disc you were trying to burn, etc) to blaze at radicalbreeze.com?
The problems you mention are ones we have not seen (and have not been reported by our users). But if they are happening to you we would certainly like to find out why and fix the trouble.
DiscBlaze
Burn & erase multisession CDs/DVDs.
Version: 6.1.7