Hi Neetu,
Apologies for the delay in responding,
Both the behaviors you have reported were not reproduced on our end against the version 9.2.0.137.
I have attached the sample used to test this behavior, you can notice the text in tab at index 2 is always 'Owner drawn' which is handled by the DrawItem event, and in the output window you can find DrawItem event is invoked for all the visible tabs.
Will you please check the sample to see if these issues were reproducible on you end, if it exists please let me know the steps to reproduce and your Essential Studio version.
Regards
Vallarasu S.
TabControlAdvApp_1a9c8ef1.zip