I absolutely synchronized. All the REFDES on top changed, all the TP values on the bottom silkscreen did not change. I also tried turning off the testpoint attribute and turning it back on, it assigned a new number. Like TP37 became TP2, even though the reference designation of this test point component is TP-V33 (which I see in the top silkscreen).
Although I will say that it is likely to depend on each individual test point whether it is a doc symbol, component or a test point component, we are looking at this very subject at the moment for an open log, so will be back with more detail here on completion.