GTA V Online Heists Replay effect on Heist Challenges

Question

Does replaying a Heist in online mode (especially the first heist) affect the Heist Challenges ? For example, will playing the first heist twice (same 2 crew members that will later make part of the 4) null and void the rest of the challenges?

Backstory: We're a crew of 3 who needs a 4th for the heists, we have guy lined up, but it's a while until he can play, so we want to rock out with the first heist mission for a while (if we can)

Answer 1

For the 10 million GTA$ challenge you need to finish all 5 heists on hard with the same crew in a row, you can always start fresh from the Fleeca heists once you have completed all heists.