It seems that the NAT Tracks are currently quite out of date or updated a day too late. Noticed it on my KATL-LIRF flight this night, with eastbound tracks still from the previous day (16th 0100z). Quick check this morning, those out of date tracks are still in and not updated.
Same now this morning for the westbound flights, it also still shows the tracks for the 16th September, instead of the new ones from today.
NAT E e.g.:
Correct one:
E
17 Sep 1130 UTC
17 Sep 1900 UTC
DOGAL 55/20 55/30 55/40 53/50 RIKAL
Simbrief:
E not avail
Eastbound
Correct one:
U 17 Sep 0100 UTC
17 Sep 0800 UTC
PORTI 47/50 49/40 51/30 53/20 MALOT GISTI
Simbrief:
U 16 Sep 0100 UTC 16 Sep 0800 UTC NICSO 48/50 51/40 52/30 53/20 MALOT GISTI
The public source that many websites were using (including some real-world ones) became unavailable a few days ago. I will hopefully have some time tonight to investigate alternatives.
Out of curiosity, what source are you using to get the current ones?