Today (when i got bored with talking to my relatives) I started up Fallout 1, made my way back to the Boneyard and killed the Mother Deathclaw.

I gained a level, waited five days and killed the one more deathclaw that spawned but I can't tell Gabriel that they're all dead (He tells me to wait a few more days).

Have I not waited long enough or have I encountered a bug?

Did you remember to kill the eggs?

Not sure, I'll have to check.