Channels are not ordered correctly

The Discord channels managed by this program should be ordered according to the provided configuration. Currently, this does not work correctly and channels end up in a different order.

Start by locating the code that reads the provided configuration and applies Discord channel ordering, then reproduce the issue with a configuration containing multiple channels. Trace the resulting order and add or update coverage so the managed channels match the configuration order.

Written by the indexing model from the issue text.