No matter what, the number of drivers (cones? Speakers? Coils? Ribbons?) in the Move 2 are not in any way equal to the number in the Era 300, so they certainly won’t sound the ‘same’. But if you’re getting ‘center channel’ voices, I will stand by my and @106rallye ‘s suggestion, that they’re ‘grouped’ rather than set up as surrounds.
Of course, if there are usability issues, you probably should submit a system diagnostic within 10 minutes of reproducing the issue, and call Sonos Support to discuss it. Don’t post the resulting diagnostic number here. There really isn’t anything we in the public can do, other than point to normal usage.
There may be information included in the diagnostic that will help Sonos pinpoint the issue and help you find a solution.
When you speak directly to the Support staff, they have tools at their disposal that will allow them to give you advice specific to your network and Sonos system.