Hi,
1. You have original account using Skybox F3.
2. You have 2nd receiver (which one?) and 2nd account.
3. Take both boxes and connect them both at your home and compare results - which one is getting errors and which one is not. Don't afraid to be banned, ban is not given immediately and forever. You will get only notifications on errors you have. Investigate the problem (if any) and take respective decision. If your 2nd box with 2nd account is OK, leave it as it is. Then, the reason is in your 1st box (settings, configs, firmware, emulator, internet connection - whatever).
We allow users to have 2nd subscription (with different username and password), even 3rd, 4th, etc. But you have to check whether one of your receivers is good for this or not. If you think that one of your receivers interrupts normal work of the second one, change it (or reflash with the latest firmware, re-install emulator, etc.)