This came up (not to me) at a local thing over the weekend. Say I use a ship with push the limit to get a focus and evade. Then, someone Jams be while using ISB Splicer. People were saying that you remove one of the tokens, focus or evade, then ISB kicks in and you remove the other. I kind of think that is horseshit. The wording of the Jam reference card says,
" When a ship has both a jam token and a focus, evade, or blue target lock token, remove the jam token. Then that ship chooses and removes one of its focus, evade, or blue target lock tokens. A ship is "Jammed" if it has a jam token."
ISB says
"After you perform a jam action against an enemy ship, you may choose a ship at Range 1 of that ship that is not jammed and assign it 1 jam token."
So since the Jam Token goes away BEFORE removing a focus, evade, or TL, then it seems like ISB would be all,"oh look, not jammed", and kick in, but sine you do not remove the evade, focus, or TL until after the Jam token is gone, it doesn't make sense that one jam action with ISB could remove 2 tokens.
Of course, this is FFG and they ARE SO GOOD at writing clear, concise rules and interactions, so I guess it might wok the other way.