I am a mod but only in MLC, as for the why? Very likely a moderated poster originally posted at say 2:19 on March 7th, and when the mod oked the post it affected the time? That's my best guess.
As for advice about finding out if there is an affair going on?
You have Divorce Remedy? pages 214-217
And while pages 224-227 are about internet infidelity, they also apply to a regular affair.
Basically, if you think something is going on, unless you are a paranoid person, there likely is.
Statistically speaking affairs are very common, common enough that it should be a fear, and while some would suggest it is nothing more than burying your head in the sand (doormat) by not looking for or ignoring an affair, DR says to make the changes to yourself even when there is an affair.
Short answer for you? It doesn't change how you DR, but it does address how you approach an affair, basically more work for you.
Experience is a brutal teacher, but you learn. My God, do you learn. - C.S. Lewis
Life is usually all about how you handle Plan B. - Jack3Beans
Listen without defending; Speak without offending - FaithinAK