Just in case, here are the steps needed to reproduce the issue in a new pristine browser profile:

1. open chrome://settings/searchEngines or open browser Settings and click "Manage search engines"
2. click "Add", enter "b" without quotes in all three input fields, click "Add"
3. click "Add", enter "a" without quotes in all three input fields, click "Add"

Now observe the list under "Other search engines".

EXPECTED: "a" comes before "b"
OBSERVED: "a" comes after "b"

If this is the intended behavior to preserve chronological order of additions (which would be quite a rarely needed feature), there should be a checkbox to display the list in a sorted order anyway.

Able to reproduce this issue on Windows-10, Ubuntu 14.04 and Mac OS 10.12 using chrome latest beta #59.0.3071.86 by following steps mentioned in the comment #1 observed the search engines are not displayed alphabetically. Observed similar behavior on chrome M53-53.0.2785.46 and M58-58.0.2989.0 as well.

zapahjpzn@ Could you please let us know on which version of chrome M58 it used to work before?

Thanks!

#4, all pre-M59 versions were using non-material settings by default, which sort the list alphabetically, but apparently your Chrome was using material settings for some reason. You need to ensure the classic (non-material) settings are used: open chrome://flags/#enable-md-settings and set it to Disabled, then restart the browser.