It can happen in the following circumstances;

1. There is more than one trainer who created course with same name and enrolled you in their courses. So the two courses come from different trainers.
2. A single trainer who created two courses with the same name (QuoDeck distinguishes between courses using course identifiers and not by name, hence a trainer can give the same name to multiple courses if he wishes so), and enroll you in both courses.

Google Chrome, being the top browser used globally, and you as 21st century user should know the top 10 shortcuts while using it.

1 – Opening a new Tab CTRL + T => Windows/Linux CMD + T => MAC

2 – Close current Tab CTRL + W => Windows/Linux CMD + W => Mac

3 – Open last closed tab CTRL + SHIFT + T => Windows/Linux CMD + SHIFT + T => Mac

4 – Switch between open tabs in the browser CTRL + TAB => Windows/Linux/Mac

5 – Switch to First opened TAB CTRL + 1 => Windows/Linux CMD + 1 => Mac

6 – Switch to Last opened TAB CTRL + 9 => Windows/Linux CMD + 9 => Mac

7 – Open new browser window CTRL + N => Windows/Linux CMD + N => Mac

8 – Bookmark current page CTRL + D => Windows/Linux CMD + D => Mac

9 – Open Cache Clearing Modal CTRL + SHIFT + DELETE => Windows/Linux CMD + SHIFT + DELETE => Mac

10 – Search the web page for text CTRL + F => Windows/Linux CMD + F => Mac