The "All Errors My Own" supplement seems to replace the basic "Crew Replacement" rules. The problem is, I can't find the original rules for them anywhere. Especially the following sentence is really confusing to me: "When choosing a crew member to be replaced, if a crew member has two cards revealed during the normal crew replacement process, then that crew member is chosen; otherwise a random crew member should be chosen. The normal crew replacement rules apply unless otherwise noted."

What cards is this referring to? What's the "normal crew replacement process"? 

In the "This Space Intentionally" supplement, there was a phrase under the Inquisition political impact: "Anyone who has committed a felony under a different Space Politics has the felony forgiven, anyone who has publicly committed a felony while the Space Politics has been White will be replaced the next time a replacement crew event occurs and will be tried for the felony."

That seems to indicate that there is some random mechanic for events like that and that they should always refer to the current trend to get flavor and specific rules (for example, if Alpha Centauri is active, getting a Replacement Event results in a crew member leaving to be sent on a mission to Alpha Centauri)... but I can't find this mechanic anywhere.

This part of the rules (All Errors Are My Own, p. 10) confuses me too: "Applying the mission control impact is tied to the crew impact applied at the same time: if a crew member wishes to get the crew impact, they must also apply the mission control impact, and if they want the mission control impact, they must apply the crew impact. The crew can elect to not have either impact affect them."

This seems to indicate there are separate crew impacts and mission control impacts, but I can't find crew impacts anywhere in the rules...