Reading previous forums it looks like 5 post is the limit. But I am sure that means back to back. Welcome to the forums and the site people aren't trying to be rude to you just an issue that seems to happen all the time becuase there is no set rule on how many you can or cannot post and new people have not been told. If you post through out the day that should be fine too. Typically if you have mystery cards post 1 and see if you get responses in the first hour then post the next one and so on. Many people are really good at responding to mystery forums.
When life has you down buy a pack of cards and realize you overpaid.