Azrobert, crap, this was a copy & paste typo in my post. Sorry about that.
The setting were all right because I set them on phone with *72<number># (unconditional call fwd) and validated the corresponding parameters inside the OBi web management interface.
Shale, for clarification, the behaviour I want is to call my number (home in this case from SP2) and get transferred unconditionally and immediately to 15143802967 (with SP2 again).
My primary SP is SP2, which is Anveo. SP1, the secondary SP, is google voice (outgoing calls only because I am in Canada).
So when I receive calls or make outgoing calls without the **1 escape sequence, Avneo is used (SP2).
Sorry again for the stupid typo, it went through despites my double-check, maybe it was a little late last night for this post.
Cheers !