I noticed that SimBrief flight plans are no longer using even numbered flight levels for westbound flights. Do I have a setting/option set incorrectly somewhere?

1,000 ft vertical separation (RVSM approved aircraft only above FL 290), only applies up to FL410. At FL410 and above, 2,000 ft separation for opposite direction aircraft is resumed, and only odd Flight Levels are assigned, depending on the direction of flight: Track 000 to 179° – odd flight level…