If these are exploits then it is possible that they were detected. If the offer is not deleted, then it is a random detection. If you continue to try your account may be banned from completing more offers.
- You must also wait 2-7 Days for ZP to show up on your account at times, Patience is needed.
In addition, you must make sure you are logged into your Account in the Z8games website when doing these exploits.
Follow this tutorial for help on Offers, without the risk of being banned;