I noticed the same thing on the LAX LHR, but this time in PE.

I “snagged” what I thought was the last two W seats on the later service as the earlier service was zeroed out in both PE buckets. Flights are now showing on the way out

AA108
F7 A0 J7 R7 D7 I0 W0 P0 Y7 B7 H7 K7M7 L7 G7 V7 S7 N7 Q0 O0
AA 136
F7 A0 J7 R7 D7 I3 W0 P0 Y7 B7 H7 K7M7 L7 G7 V7 S7 N7 Q0 O0

If I opt to start and end at SAN, I get the following


AA 6062
J7 D7 I0 Y7 B7 H7 K7 M7 L7 G7 V7 S7N7 Q7 O7
AA 108
F3 A0 J7 R7 D7 I0 W2 P0 Y7 B7 H7 K7M7 L7 G7 V7 S7 N7 Q7 O7


AA 2960
J6 D6 I2 Y7 B7 H7 K7 M7 L7 G7 V7 S7N7 Q7 O7
AA 108
F3A0 J7 R7 D7 I2 W5 P0 Y7 B7 H7 K7M7 L7 G7 V7 S7 N7 Q7 O7


AA 6089
J7 D7 I2 Y7 B7 H7 K7 M7 L7 G7 V7 S7N7 Q7 O7
AA 108
F3A0 J7 R7 D7 I2 W7 P0 Y7 B7 H7 K7M7 L7 G7 V7 S7 N7 Q7 O7


AA 6089
J7 D7 I6 Y7 B7 H7 K7 M7 L7 G7 V7 S7N7 Q7 O7
AA 136
F3 A0 J7 R7 D7 I6 W7 P0 Y7 B7 H7 K7M7 L7 G7 V7 S7 N7 Q7 O7


AA 6035
J7 D7 I1 Y7 B7 H7 K7 M7 L7 G7 V7 S7N7 Q7 O7
AA 108
F3 A0 J7 R7 D7 I1 W4 P0 Y7 B7 H7 K7M7 L7 G7 V7 S7 N7 Q7 O7


AA 6035
J7 D7 I5 Y7 B7 H7 K7 M7 L7 G7 V7 S7N7 Q7 O7
AA 136
F3 A0 J7 R7 D7 I5 W3 P0 Y7 B7 H7 K7M7 L7 G7 V7 S7 N7 Q7 O7

So now I’m seeing at least W availability and at least 1 itinerary is W7 depending on the flight taken out of SAN