Queue item gets updated vs being added twice to the queue

Hello,

I have 2 records from the same entity, Record 1 and Record 2.

I have a workflow that ran 3 times for each record. This workflow adds the record in question into Queue x, using the step Create Queue Item.

Now for Record 1, I ended up with 3 queue items in Queue X. Each queue item has a different Created Date which corresponds to the time each workflow instance ran.

For Record 2, I ended up only with 1 queue item in Queue X. The same queue item got modified with each workflow instance (3 times). The modified date is different than the created date and it reflects the same date the last instance of the workflow has ran.

I tried to figure out, for 3 days now, the reason behind the difference in behavior but I have no luck.

Any suggestion is appreciated.

Thanks.