What does "in progress" means with LOE?

[yueru]

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I have two "in progress" with two letters and one is "Completed". I am confused because the two letters with "in progress" were submitted earlier by my refernces while the last one with "completed" was just submitted today.
Anybody knows what happens and do I need to ask my references to resubmit the letters?
Many many thanks!!!

 

[SSD1]

That means the referee uploaded the letter and didn't press submit.

That happened to me as well and my referee had to go back and press submit...

 

[yueru]

Thank you very much and I will ask them to "submit" the letter!

 

[SSD1]

You are very welcome!

 

[LetsGo2DSchool]

This must be the Dark Ages when grown adults don't know how to click the 'Submit' button.