That's why I see 'reserved' frequently appears in many signature campaign spreadsheets in the list of participant names.
I done this type of mistake because many campaign mangers says in their reply "wear your signature and avatar within 24 hours" I think it's a deadline after this i cannot allowed to participate.
but now i know how it works it was simple but i was unlucky to not getting paid for 2 campaign because of my simple mistakes.
Communication is very important between participants and bounty managers you have good managers who can understand your situation if you communicate it, instead of letting them guess.
I also experienced this in the past when I needed to wear the signature in the next 24 hours but I still needed 48 hours before the manager counted my post I ended up wearing the signature and just forgot the days I am active on my current campaign.
Sometimes you have to decide what's best for you in case your managers deny your request or you have no choice but to decide which is a better campaign, when it comes to bounty campaigns communication is very important.