Re: Odd cast time showing
Not in the Cast List. There it would show log in and post times which match. The only place it would show a different time would be on the post itself. So if a player really wants to write down all the times on every post, then look for a pattern of variations between those post times and the Cast List times, then eventually, yes, they could work out that the post times don't match between the Cast List and the posts.
Note that this would be tricky, because the Cast list doesn't tell players the exact time of the posts, only the day.
In addition, if the GM is running a PC for a player who is sick, or on holiday, the Cast List still bases its log in times on that (missing) player, but the post dates are based on the character, so you will get cases where the player has not logged in for three days, but posted today.