I've examined Tom's track logs to determine if he exceeded the
height limit on the fourth task of the pre-Worlds. One track log was from his
backup Flytec SensBox and is the one that he uploaded to the XContest here:
http://www.xcontest.org/world/en/flights/detail:tomtom01/1.9.2016/14:24 and
the other is from his Oudie 3 and can be found
here. Both track logs tell very similar stories so I'll just go with the
Oudie 3 track log which is most favorable to Tom's case.

The Oudie 3 track log when displayed by SeeYou without any adjustments to
pressure altitude in the flight properties dialog box shows Tom getting to
9,128' (2,782 meters) at his highest, which is 24' (7 meters) above the maximum
allowed height (9,104' or 2,775 meters) for the task which includes the 30 meter
error band. SeeYou automatically adjusts the displayed pressure altitude by
setting the landing pressure altitude to the actual landing altitude (static GPS
altitude). So the pressure altitude recorded in the Oudie 3 would not be the
same as the one displayed in SeeYou.

The pressure altitude recorded for the day at 18:30:39 UTC, when Tom is at his
highest, is 2,728 meters or 8,950'. This would be below the height limit.

Tom has stated that he calibrated his SensBox (from this article
http://ozreport.com/20.179#3 he appears to be referring to his SensBox) 
and I assume his Oudie to launch altitude. Launch altitude would be 4,068'
(1,240 meters) according to the task board:

If I adjust the pressure for the day (at launch time anyway) for Flight
Properties in SeeYou to the values given above I come close:

Ignore the UTC offset. Tom's take off altitude is now set to 4,064' (1239
meters) in SeeYou. Using this pressure altitude for launch (very close to the
actual altitude), which adjusts for the actual pressure at the time of launch,
SeeYou determines that Tom's altitude at 18:30:39 UTC was 9,166' or 2,794
meters, 162' (49 meters) above the maximum altitude.

Since Tom likely made the pressure altitude adjustment on his Oudie 3 at launch,
it would have displayed this adjusted altitude and not the pressure altitude
that is recorded on his Oudie 3.

Tom writes (http://ozreport.com/20.179#3):

On my line I hit good lift and I started to glide faster so as to
not go over the altitude limit. I was already close to 2,775 meters MSL (30
meters extra included as briefed at the pilot meeting).

At 18:28:10 UTC Tom was gliding at 69 km/h (43 mph) and was at
8,959' (as per the adjustments above) (2,731 meters). As you can see here he
stayed about at that altitude for about two minutes:

For three minutes stating at 18:28:10 UTC he stayed close to and averaged 70
km/h. That is, it would appear during this time interval he is not completely
pulled in but flying at a moderate speed.

At 18:30:39 UTC he hits his highest altitude (9,166') still flying at a moderate
speed of 68 km/h. At 18:31:01 his speed begins to increase. Eight second later
he is going 151 km/h. This would appear to coincide with Tom's statement:

But instead of diving out and away from it, the lift it got
stronger, so I pulled the bar in as far as possible for the fastest speed.

So it would appear, but we don't know, that Tom pulled in after he
got too high.

Tom writes:

Then the nose went up vertically and the glider wanted to go into
a loop. I put all my weight to the right to make a wingover instead.

At 18:31:12 UTC the glider starts a climb that goes up about a
hundred feet from 8,562'. This appears to coincide with Tom's statement above.

Tom writes:

Well, I just could download my backup GPS (Sensbox by Flytec) of
task 4 which is telling me that I had a maximum GPS altitude of 2,906 meters or
2,752 meters barometric altitude QNH (23 meters below airspace) calibrated on
take off at takeoff altitude. This would mean that I was not over the limit of
2,775 m QNH at all!

This is what I found also. If the track log values are not
adjusted for the pressure altitude for the day at launch time then these are the
values that one gets. But as far as I can tell these recorded values need to be
adjusted for the actual pressure for the day given to pilots at launch.

Tom writes:

The same evening I wrote a complaint about what had happened
before the scoring as a pilot's report. The main statement was that I have tried
all I could to prevent getting higher than 2,775 meters MSL without any chance
to avoid that as detailed above.

It would appear that Tom actually did have an opportunity to avoid
going over the maximum altitude limit by flying much faster, which he did after
he broached the limit.

Tom writes:

I asked that they should check QNH altitudes of my back-up
instrument, which was downloaded, but they did not. They just gave me zero
points for the day. But at briefings it was said that always the lower numbers
in favor of the pilot would be considered. This was not done in my case as I
understand it now.

I am not aware of whether the scorekeeper was using GPS or
pressure altitude for scoring but in either case it would appear that Tom flew
higher than the maximum altitude (at least if my humble understanding of how
these adjustments are made to the track log is correct).

I'll publish Tom's latest thoughts soon.