Sent-ts and tmi-sent-ts tags?

Chat and IRC
3

An example would be:

@color=#0000FF;display-name=DongerinoCopyPasta;emotes=356:0-5,36-41;sent-ts=1437250120418;subscriber=0;tmi-sent-ts=1437250120654;turbo=0;user-type= :dongerinocopypasta!dongerinocopypasta@dongerinocopypasta.tmi.twitch.tv PRIVMSG #imaqtpie :{msg}

And it only happens occasionally: pic of output

Edit: Pic