The $120 including tax for a standard room at the WL for 1/31-2/7 was not an error. I had it under the BRP at $150 per night and it dropped to $120. I did change the $120 standard room to a courtyard view room for about $182 per night.
12/12-12/19, 2004 we stayed in a woods view(lodge view) room # 5034 at the WL for $135 per night tax included. I just looked at our receipt. I haven't stayed in a standard room at the WL' but if I recall they were a little less than $120 per night then. They may not be lower in the future.
I have stayed at the WL 20 times and as of a couple of years ago(1/11-1/18, 2004) we got a courtyard view room (room 3151) for about $156 per night tax included. Looked at receipt. That isn't an error.