Please remove the keyboard shortcuts for moving beween categories.
This is what happens:
You edit an entry and need to edit some existing text, e.g. by pressing backspace to remove a letter. Meanwhile in the background, the Survey Tool is still running some checks on the previous entry. Once the checks are done, the Survey Tool removes the focus from the current input field and reassigns it to the entry that just finished its checks.
If the user happens to be hitting the wrong key during text entry at the time, you end up with the previous or next category, and since the user sometimes hits more than one key in succession, the user ends up on a random category. You then have to remember which category you were in, find it again, then remember which entry you were in and scroll scroll scroll...
An alternative solution would be not to assign focus to entries when they finish their checks and recording the vote. That would be even more convenient.