Joomla module doesn’t save settings
This article is actual for all Joomla modules.
If you can’t change the contact form button color or add new markers to the Google map and etc., probably you have delete copy of a module in the “Module manager” and create new one. The “loadmodule” pattern will load settings for the first (deleted) module, because actually you just trashed, not fully delete it. You can read how to fully delete module in Joomla in this article.