If it is specific to New Items - Ideally duplicate rows shouldn’t be there unless you are writing in the same excel while running the process multiple times
100 is the cap set by UiPath to avoid memory exception as a Queue could contain huge number of records
You could build a logic using SKIP and TOP properties of get queue items activity to fetch all the new items. Skip 100 will skip the first 100 items and start from 101 item. Based on the loop count - you could build a logic to extract all the records
