Do not REMOVE anything that you are unsure of. The sources on the profile are not legitimate.
As a general rule, no one should remove anything from a profile unless there is a valid reason, i.e., a source with a link, typo, etc. Please completely understand what change needs to be made and why with the explanation left.
If you don't understand a suggestion on a profile during the challenge you are doing a good job with, leave the profile alone; the "not corrected" and comment you don't understand is not necessary or helpful, and that is not meant to sound harsh in any way.
Work on only what you understand, and I will take a look at some of your work and let you know if there are any issues—[I am a Project Coordinator lead for the Data Doctors Project].
So far, so good!
Another suggestion: work only in locations you are familiar with and in timeframes you are comfortable with. In other words, if you live in the US and are working in the states, leave Norweigan profiles to those who work with that region and language. There are differences you may not be aware of.
Stay safe, and please feel free to email me with any questions as you work through these.