I think the reason must be the map and clock.
I also think when Q quotes himself or reposts something, its 100% becaues of how the map/clock works, it must be the time or something, and its just a part of a bigger message.
Thats also the reason why i cant spend much time with WHAT Q says, but I'm much more interested in the time, date, codewords, patters, and so on. Maybe i'm wrong with thinking there is a bigger picture we could already have access to, but i do think so. On the other side, i trust Q so much, if something would not be ok he would tell us.