Did he violate the temporary injunction or does the injunction start when I have been served with papers and sign the agreement?

The temporary injunction only applies to unilateral actions, it does not apply to something you agree to do. So if you agreed to take him off the lease, and he wanted that to occur, there is no violation. The injunction is in effect when the judge signs it. You can claim ignorance of it, but once you have been served, you are on notice and ignorance is no excuse.