I noticed this behavior and i'm not sure if it is intended, when project TM is enabled, in the editor, "translation results" and "fragment matches" tabs show that only the project TM is enabled. i.e. Translation Results - Project name_TM name, while "concordance search" shows both the main TM and the project TM.
Trados returns a lot of fragment matches from the main TM if I disable the project TM, and there are almost no fragment matches when i have the project TM enabled. Proving that indeed only project TM is looked up.
This is very counter productive if it's the intended behavior of project TM, or did I miss something that I need to set up to have it look up both the main TM and the project TM?