Multiple action_traces, which one is the “good” one?

Question

Sorry if I'm asking a lot of questions but you're really helpful and I'm getting a better understanding of the platform every day thanks to you ;)

I'm having a hard time figuring out why some transactions are "duplicated" whereas some are not. I found on this forum people referring to act_digest as being a potential unique identifier (same act_digest = same transaction) but amongst there various transactions, which one is to be considered the "valid" one? How can I double check that?

They have much in common but for example, the following information aren't identical from one to another "transaction":

• global_sequence
• recv_sequence
• block_num (this one is interesting as the block_num is different but the block_time is identical)
• producer_block_id
• createdAt

Is it possible that the same transaction was processed by different BP but only 1 is to be considered as valid but it doesn't matter which one?

Thanks in advance for your answers,