Wrapping a Box with Art

Hi there, Just starting out and I'm just trying to get the artwork to fit a simple box in Dimension.
• I've sized the box in Dimension to the exact size of the artwork.

• Exported UV of Box from Dimension where I get weird export with lots of sides

• Opened in Photoshop

• Because I have no idea which side goes where from the exported UV, I put numbers to see where sides are going

• Import UV back into Dimension and Fill box and numbers are everywhere and makes no sense.

See Pics

I must be doing something wrong? Please help