The various special tricks people have learned kind of miss the point of the OP. The OP is talking about what a new parent does when looking for her kid’s results.
However, I don’t see very much room for improvement in the way that process works. You have to enter the kid’s information to get to the right kid. It’s reasonably intuitive how to get to the right page to enter the kid’s identity. Once you enter the kid’s identity, you get a link to the specific kid’s page. That’s necessary because your kid isn’t the only John Smith in the database. (Of course, this is the 21st century, so they are more likely to be looking for Aiden Smith.)
Once you get to the page, it’s pretty clear what to do, with one exception. For a new player, which is what we are dealing with here because it’s a first time mom or dad looking for the rating, their page will show “unrated” for the rating. The user isn’t likely to understand any difference between the “official published rating” and the temporary estimated rating that is shown in the tournament history. In fact, they will have never seen the “tournament history” page at all. It’s just one of many tabs stuck at the top of the page. Once they see a piece of information that appears to be what they are looking for, they will assume that it is in fact what they are looking for, and it is at that point Rob will get a phone call from some parents. Most parents will figure out that the very sparse record they see on the front page is probably incomplete, and hunt around a bit, but some will instantly conclude that someone else must have made a mistake, and will set about correcting it.
You could get rid of a few phone calls by also including the temporary rating as of the last entered tournament along with the official, published, rating on the front page, but having two ratings will confuse people who don’t know the difference. They might think that Rob did something wrong that caused the tournament to be considered “unofficial”.
You could make things slightly easier by including a line underneath the official rating that said
Most Recent Tournament Date Rating Change
Friday Night Chess 11/15/2013 Unr->483P3
And maybe sticking in a line like
Official Rating (Updated monthly)
Unrated
That should be pretty easy, but the benefit probably wouldn’t be very great. It might be a slight improvement. Certainly not a high priority fix.
ETA: And just to check, I looked up Aiden Smith’s MSA page. It already has what I thought it ought to have with regard to the official rating. I could see some slight wording changes that would make marginal improvements, but they really are marginal. My idea for “most recent tournament” is complicated by the existence of three ratings. It’s still plausible, and might make a slight improvement, but not much. I think the people who make the sort of phone calls Rob has an issue with would just find some other reason to make a phone call.