He's worried is all.. He's scared and he wants to keep playing you like a piano... Once you STOP taking his calls he realizes he may NOT have control over the sitaution HE CREATED
He wants to keep playing BOTH for as LONG as he CAN...
Do NOT take his calls... He's stuck and you are fortunate enough to have time to plan here... do NOT RUIN that by taking his calls...
If he had anythign important to say he would send an email with a real message...
The fact that he wants to CALL is indicating he wants to manipulate you and he can do that a LOT EASIER over the phone and he KNOWS IT...
You cannot TRUST this guy right now or think that he's suddenly come to his senses and that he's had a sudden epiphany about any of this...
