Files 'transferred successfully' but not in destination, and can still see them in FileZilla

[Megha Patel]

I use FileZilla regularly but have never come across this before - the files that I upload to Adobe Analytics data sources both ‘transferred successfully’ but I don’t see the data in Adobe Analytics. I normally see them within 24hrs, and it has now been over 2 days.
When I check FileZilla, the files are still in there, where normally they would disappear.
This has happened for both of my separate clients' uploads so I don’t think I’ve done anything wrong. What can I do? I don’t want to re-upload before confirming as it won’t overwrite it but add the numbers, so if both eventually upload, the numbers would be twice their value.
When possible, I can attach the files for review and a screenshot example of FileZilla

[Megha Patel]

Screenshot of example files

[Megha Patel]

Client 1 txt file

[Megha Patel]

Client 1 fin file

[Megha Patel]

Client 2 txt file

[Megha Patel]

Client 2 fin file