I'm under the impression that Moira's Journal is a sequential recording of her 10th life eXperiences only. The last two entries shown are when Magneto turned against them, which would've been prior to the events of 1963's XM #1, and then finally when she seemingly died pre-Genoshan genocide, HoM, etc. I'm still not sure any of those specific tragedies happened in her prior lives, as everything in the 616 timeline up to HoX & through to DoX, took place in -- and were possibly unique to -- her latest reincarnation.