Hello,

it might actually be that i have some sanity checks in the code to verify a certain number of basic information (name might be one of them)

I will try to check this out.

In any case, the way i use this tool is to add all the contacts that at some point i might want to have on the phone to a group, say Phone.

This means that a lot of the crap that google sneaks into the contacts (like emails of someone you write only once or something like that) stays in "My Contacts" but never gets into the phone.
Plus additional groups, that allow fine grained filtering.

I was also planning to let the user program the way + and - work (like the boolean logic behind).
I will probably do that, at some point, maybe when i will add presets too