Why?

Sorry for the super late response. The reason for this is because unless theyre all blank it will still load data from the other profiles during the run, which effectively does not count as a run from a blank file.

Wtf how lmao. whats like an example of it loading data from another file haha

For instance, you have a file named "AAA" with times and everything unlocked. If you create a new file "AAB" you will still have access to the unlocked cabbies, bikes and times from file "AAA" on the Crazy Box menu screen even if you have file "AAB" loaded