Hypothetical theory to explain the Nov 26/27 dates and the R's seeing info about Kelsey on facebook during that time period:
Let's assume the R's are being truthful to the best of their knowledge. Let's say that the R's were
only told by M the first names Patrick and Kelsey when she told about KK being asked by P to help murder Kelsey. They were told of the possible solicitation back in October and asked for M to have KK come see them. KK never came to see them and instead M said to the R's "forget it". Let's say for minute we buy that the R's thought that meant it's likely not serious-- perhaps just a drunken rant or something, but they were still bothered by it and remembered the first names Kelsey and Patrick.
Now fast forward to Nov 25th-- we know KB had been murdered by that point and her phone was used to send text messages to PF and KB's job. Let's say that on Nov 26 Mrs R really DID see a facebook post about a missing CO woman named Kelsey and alarm bells went off in her head. She goes to M and asks if the woman that they had previously talked about named Kelsey was missing. M supposedly contacts KK and says "My boss saw on fb that KB is missing, is it true?"
and perhaps KK, who has guilty knowledge that Kelsey really is gone but doesn't know that it's not on facebook yet, replies it's true KB is missing. M comes back to Mrs R same day (Nov 26th) and says-- "that's her, she's missing and a pilot too".
Now here's the hypothetical-- Perhaps the Nov 26th facebook post Mrs R saw about a missing Kelsey from Colorado was really a post about the missing
Kelsie Schelling. Although Kelsie Schelling has been missing since 2013 there were new developments in her case in 2018-- enough that people might have been posting and sharing about her still being missing. If Mrs R only saw a post that said something like "please help find my missing friend Kelsie from CO" and didn't click any links or do any investigating to see when this Kelsie went missing she might have thought it was a recent case. So the R's gave their 24 hour ultimatum after getting the answers they did and when they heard KK got a new phone number they assumed that meant it was true she spoke to LE and was taking actions to protect herself from PF.
This theory still doesn't explain why the Rs wouldn't have taken action and contacted the police themselves as well in Nov. But it would explain the wrong dates and it would reveal that KK (and by extension M) knew about KB being missing before she had been reported missing. The Rs could be key witnesses if this were the case.
MOO.