Conventions regarding listing grant applications/funded grants on a scientific CV
My philosophy about such issues is that you can list everything on a CV, as long as you make clear what your actual role was, i.e., you may list any project or grant that officially recognizes you in some function, but of course you cannot imply that you were the PI in all of these projects if this was not the case.

Further, make sure that you list only "official" responsibilities on the CV - it may be true that you are doing all the work for a project, but that does not make you the official PI. Saying or implying otherwise is not good.

Finally, note that different roles in a project can be used to illustrate different things for you as a researcher. Personally, I have two different sections for projetcs on my CV:


Projects, which lists all funded projects I was ever involved with, plus my official role. This shows that I am experienced in working in different roles in different national and international research teams.
Successful grant proposals, which lists all successful project proposals that I was officially recognized as an author, i.e., either coordinator, PI, or co-investigator. This shows that I am able to get funding for my research.