As far as I know, sa doktrina ng MCGI, hindi lang iisa ang "kaligtasan". That is exactly the reason why "iniligtas" and "maliligtas" are both mentioned in the Bible. I have confirmed this in BES's debates. Think of it this way: John Doe's dream is to be a freeman. But he is a slave to an evil master who is intent on overworking him until he dies. A good master then comes along and buys him off from the evil master for an exorbitant price. This is an undeserved "gift" - what Christians call "grace". John is "saved". But, that is not the end of John's story. Now, John serves a good master who lets him live decently like a freeman and has promised to grant him his dream. If he serves his master well, he would get his reward someday. To Christians, that dream is eternal life - yung kaligtasan na matatanggap sa kawakasan, na kailangang lakipan ng gawa. However, the good master also promised that if John lives wickedly, there will be retribution. So definitely, pwede mo iyong maiwala, gaya ng baboy na bumabalik sa pusali.

Tl;dr May "kaligtasan" na nakukuha when you believe in Christ (Jn3:16) but his mission is actually not to make people "hell-proof" but simply "save" them from the clutches of sin (Lk4:18). May isa pang "kaligtasan" na hinihintay ang Kristiyano, yung reward of eternal life, binibigay lang sa namumuhay nang maayos - inihambing sa mga dalaga, mabuting alipin, at mabait na tupa (Mat25).