Thank you for your speedy reply. I have already followed these steps to allow custom transaction numbers, still after attempting these changes within an Incognito Tab in Chrome, same issue. I have checked all accounts searching for discrepancies in check numbers and I do not see any duplicated checks or skipping in numbers. Below is my process of how I write a check as I am new to the online experience of QuickBooks.

1. Click New 

2. Check

3. Fill out Check Info (Adjusted to the correct account)

4. Unclick Print Later

5. Adjust Check # to the correct one

6. Print the Check (Print Screen shows correct check number)

7. Finish Print

8. Next check reverts to the original incorrect check #