It doesn’t look like either have met the criteria for automatically moving up to TL1. 
Was the TL1 user invited using an invitation link? I believe the default for Default invitee trust level is TL1, so that may account for it?
It doesn’t look like either have met the criteria for automatically moving up to TL1. Was the TL1 user invited using an invitation link? I believe the default for Default invitee trust level is TL1, so that may account for it?