Landed doesn't line up with chunk

[philderbeast]

It looks like FS is not assigning chunks the same as flare-timing. For Forbes 2018, task 5 some landed distances agree with the chunk distance but for others below they seem off. Here's the worst differences:

###-Pilot	Landed	✓	Δ	Chunk	✓	Δ
107-Anatoly Reyter	84.619	84.610	+0.009	84.6	90.1	-5.5
099-Gennadiy Khramov	82.529	82.515	+0.014	82.5	85.4	-2.9
034-Brad Porter	87.306	87.251	+0.055	87.3	89.3	-2.0
068-Neale Halsall	95.509	95.511	-0.002	95.5	97.0	-1.5
025-Tyler Borrdaile	93.972	93.962	+0.010	93.9	95.2	-1.3

[philderbeast]

It's even worse with some other tasks.

Task	###-Pilot	Landed	✓	Δ	Chunk	✓	Δ
6	032-Andrew Barnes	63.302	62.981	+0.321	63.3	85.6	-22.3
7	103-Wayne Thompson	115.661	115.331	+0.330	115.6	119.4	-3.8
5	107-Anatoly Reyter	84.619	84.610	+0.009	84.6	90.1	-5.5

[philderbeast]

Here's Andrew Barnes data and results for task 6:

<FsParticipants>
  <FsParticipant id="32" name="Andrew Barnes"/>
<!-- Task 6 detail for Andrew -->
<FsParticipant id="32">
  <FsFlightData distance="85.698" bonus_distance="96.058"
    started_ss="2018-01-04T13:52:38+11:00" finished_ss=""
    tracklog_filename="Andrew Barnes.20180104-073828.5800.32.igc"
    lc="4.26114956015612" iv="200679199"/>
  <FsResult rank="40" points="167" distance="85.698" ss_time="00:00:00"
    distance_points="167.1" linear_distance_points="105.65" difficulty_distance_points="61.43"
    time_points="0" arrival_points="0" leading_points="0"
    penalty_points_auto="0" penalty_reason_auto="" started_ss="2018-01-04T13:50:00+11:00"
    real_distance="85.698" last_distance="62.981"/>
</FsParticipant>
<FsChunk chunk="856" start="85.6" end="85.7" end_ahead="109.4" down="1"
    downward="4" rel="0.000514297469656449" frac="0.149351985188234">
  <FsDown id="32" down="85.698"/>
</FsChunk