So if I'm understanding...
Each age division has 2 scales.
The kids will sit in the stands in a cetain section according to age.
Each section will have a few rows of seats assigned per weight.
When the kids enter they find their age section and sit in the row that is assigned for their weight.
When weigh ins start they call the kids down to the floor by each weight division.
You then cycle thru each weight division over and over until the end of weigh ins.
If you come in at 6:00 you just go to your age and weight area and wait for them to call that group again.
If you don't make weight you go do what you need to do and then go sit back in your area until they call that group so you can try again.

Pros and Cons
Pros
You know where your kid is at all times! He's not mixed in this herd getting pushed around or back by older kids.
Its way more organized and goes faster for the people doing the weigh ins.

Cons
The wait for the wrestler SEEMS longer. Especially if they don't make weight the 1st time. But in reality its faster.
If you have a group of kids of different ages and only a few adults trying to stick together (siblings, car pool) it can really spread them out. So pick a "rally spot" for everyone to meet at after they are done. It helps from chasing kids all over.
You always get that kid that just missed his group and wants to get squeezed in real quick... stick to your guns and your process. Once you make exceptions for one kid everyone wants one.

I like the idea. Yes if your one of the heavier weights then you have to wait a little longer initally but eventually the wait time is the same one the cycle repeats.