As always happens in these cases, we need a sample of files or a data set where the problem can be reproduced, along with a description of the steps necessary to reproduce it. If you can upload some data using Dropbox or a similar service, we'll be glad to inspect it to analyze the problem, time permitting.
As Chris has pointed out, this forum is the correct resource to get help on practical image processing issues like these. Please note that our email support service cannot provide this kind of assistance. Our email support is not a teaching or learning resource. Its purpose is exclusively to help solve software installation and configuration problems, to help with license management issues, and to provide general information on PixInsight and related projects.