Are you pulling it tight across your shoulders when you put it on? When I put mine on, I put it around the tummy quite firm and over the shoulders and then tuck it under and then pull down quite firm so its nice and tight. Then I wrap around and tie off.. .gosh I hope that makes sense.
Normally if the front bit is loose once I pull it over Jake then I take it off and do it again, sometimes its because it wasnt tight enough when it criss crossed over my back so when bubs does in he pulls it down and its baggy...
Aggh, its hard to explain.. HTH
I cant seem to get the front facing right, but your not quite there yet LOL