i got the most recent beta invite this past friday. do i need to be invited again for the next beta invitation? Does anybody know when the next beta invitation will be?

No info as to when the next beta will be. And yes you'll receive a new beta invite to the next test you're able to join. Just because you were in one test does not guarantee you a spot into future ones.

ok thanks for the reply. i only played it for an hour or so so id definitely like to be in it again. also i think i posted this in the wrong forum

Best bet to get into the next beta. Fill out the questionnaire with constructive feedback. Tell them what you liked, what you didn't like, what kind of bugs you found, that find of thing.