hi - welcome to the board!
is this description of your problem right:
"I have a master table containing results of max x number of tests on various dates. I also have x separate tables for each of the tests. If a test has an entry on the master table, I want it added to the bottom of the corresponding individual table. The resons this is a bit complicated is that not every test is performed each time, so the individual tables don't necessarily need to be updated for eah entry in the master table"