Can only say how works in the school I teach in (but my DDs' seems to operate similarly) simply put only the PT is given the print out.
In the olden days pre cut backs one of the admin staff put them all in a spreadsheet for everyone to access, sadly non-teaching staff have been slashed as only teacher numbers are protect- for now.
Giving components grades is a time consuming process as every element of the course is recorded separately and not in alphabetical order. To let my PT speak to pupils about post award matters I took the records on Thursday. For my subject (English) only 4 pupils didn't sit Nat 5 in S4. I was cross eyed trying to find 5 pupils their 3 elements.
Give them a chance- first week back is crazy. They have all the kids who want to change, post results , staff changes etc. If your DS is a possible candidate for a remark,where I am, we've spent lunchtimes going over the records to identify them - they'll find him.
If it's just he can be aware of areas of strengths and potential development please give it time - I hope no school would want to annoy or ignore a parent. It just be that they are prioritising getting the deadline driven issues completed first.
Re email most of the schools I've taught in the policy is that the individual teacher email address is never given out and all correspondence goes through main address. Only exception was my short spell in an indie (shudder).
Hope this helps to explain that it genuinely may not be the case that they're giving you the run around . Buff you haven't heard by end of next week - then they are!