That happens on every device. "Ignore" works like you leave the phone ringing. In this mode, if the call is the first call coming in, it will block other calls to connect.
You may experience it without using MagiCall.
1) Quit MagiCall
2) Use a number to call your mobile phone. Don't answer this call, let it ringing on your phone.
3) During your mobile phone is ringing, use another number to call your mobile phone. You will have the same result.
I think "Pick up and drop" would be better for you.
This set of rules work just fine on my ASUS 535 (WM 6.1).
I understand what u are trying to say however it is not what i mean.
I test this rule by having the number in the rule 3 (ignore rule) call my cell. Then I wait until that ignore call is drop. Then I use another number in rule 1 to call my cell. My cell doesn't show the incoming call number and i can't pick up that call.
This situation won't happen when i repeat the same procedure on my ASUS P535.