changing limit in json api requests does not change number of results returned

Modifying limit= parameter in a url like "https://errors.ubuntu.com/api/1.0/instances/?format=json&limit=200&id=failed%3A/usr/lib/x86_64-linux-gnu/indicator-sound/indicator-sound-service%3A11%3Ax86_64%3A/lib/x86_64-linux-gnu/libglib-2.0.so.0.4000.0%2B7e6ad%3A/usr/lib/x86_64-linux-gnu/indicator-sound/indicator-sound-service%2B1c770%3A/usr/lib/x86_64-linux-gnu/indicator-sound/indicator-sound-service%2B1bb78%3A/usr/lib/x86_64-linux-gnu/indicator-sound/indicator-sound-service%2Bb7e6" does nothing.

Here I changed it to 200 and 50 and I always got 100 results. (The crash has 300+ instances.)

brian@snakefruit:~$ ./research-retrace-failure.py 'failed%3A/usr/lib/x86_64-linux-gnu/indicator-sound/indicator-sound-service%3A11%3Ax86_64%3A/lib/x86_64-linux-gnu/libglib-2.0.so.0.4000.0%2B7e6ad%3A/usr/lib/x86_64-linux-gnu/indicator-sound/indicator-sound-service%2B1c770%3A/usr/lib/x86_64-linux-gnu/indicator-sound/indicator-sound-service%2B1bb78%3A/usr/lib/x86_64-linux-gnu/indicator-sound/indicator-sound-service%2Bb7e6' | wc -l
100
brian@snakefruit:~$ vi research-retrace-failure.py
brian@snakefruit:~$ ./research-retrace-failure.py 'failed%3A/usr/lib/x86_64-linux-gnu/indicator-sound/indicator-sound-service%3A11%3Ax86_64%3A/lib/x86_64-linux-gnu/libglib-2.0.so.0.4000.0%2B7e6ad%3A/usr/lib/x86_64-linux-gnu/indicator-sound/indicator-sound-service%2B1c770%3A/usr/lib/x86_64-linux-gnu/indicator-sound/indicator-sound-service%2B1bb78%3A/usr/lib/x86_64-linux-gnu/indicator-sound/indicator-sound-service%2Bb7e6' | wc -l
100