Hi Satyendra,
Thank you for sharing the feedback. I have observed the issues shared by you and have been able to reproduce 2 of them during my export to PDF while using Aspose.Slides for Java 7.4.0 in Windows 7 x64 with JDK 1.6 environment. I have also attached the generated PDF and issues image for your kind reference.
I have created an issue with ID SLIDESJAVA-33918 to further investigate and resolve the issue of improper label rendering. A separate issue with ID SLIDESJAVA-33919 has been created to resolve the improper rendering of leader line. This thread has been linked with the issue so that you may be automatically notified once the issue will be resolved.
We are sorry for your inconvenience,