New members of this site have some light restrictions on how many games they can join or create at once. You need to play at least 20 phases, before you can join more than 2 games, 50 phases, before you can join more than 4 games and at least 100 phases, before you can join more than 7 games at once. 2-player variants are not affected by this restriction, but they do not count towards your phases played. Also live games do not add up to your phases played too.
You can see your total phases played and more useful information in the reliability section of your stats page.
The restrictions are in place to ensure all new members do not jump into more games then they can handle. Diplomacy games can take up a lot of time so please test out several games before committing to multiple.
PLEASE NOTE: If you fail to submit orders for your country in consecutive turns (usually 2) the country is sent into "Civil disorder" which allows any site member to take over your position to ensure that the game's integrity is not negatively impacted.
If you have missed turns in your games, or if your countries fell into CD then you will be restricted in the number of games you can play regardless of how many phases you have completed. This is to ensure that all players take care not to take on more games then they can keep up with, and to ensure that players who do not respect their fellow members are not given the chance to ruin multiple games.