When you save a custom pal, it saves a file called fcw32.pal in your CC3+ data directory. If this file is present, ALL maps that doesn't have an attached palette will use this instead of the default palette. So the solution is to delete or rename this file, and CC3+ will revert to using the default again.

Check that you haven't disabled Hotspot under Tools -> Options -> Links and Hotspot are active.

An additional thing to look for when things doesn't seem to go right is the number of selected items during the command. The command line will show the number of entities selected when you do the multipoly, and if you expected to multipoly 2 entities, but the selection tells you 3 selected, then that is a good indication that you have an extra entity in there somewhere, possibly a doubled-up one like here.

Is that red polygon in the middle a separate polygon you can manipulate? Could it have been there from before you assembled the multipoly, perhaps as a copy of the blue entity?

Multipolies take on the properties of the current settings when created, not the properties of it's member, so that the multipoly itself became an outline could just be that fill style was set to hollow when you issued the command.

But, if that central red section is part of the multipoly itself, it is something I haven't quite seen before. If that is the case, can you post the .fcw file so we can take a look at it?

There are 3 main reasons this can happen:

1. You don't have the right toolbar open. Overland toolbars try to load different tools than city toolbars. Maps should load the correct toolbar automatically when they are opened though, unless you have changed the OnOpenMacro map note.
2. As you have found from other replies, if the map is set to the wrong toolset for the style, this can happen. You can always check whatever toolset is actually in use by clicking on the :CC2DRAWTOOLS: button in the left toolbars. It will show both what tools are available, as well as the current style of drawing tools in the dropdown in the top (should match the style of the actual map to work correctly)
3. The style you are using simply doesn't have a drawing tool for that particular feature. Not all styles comes with tools for everything. Again, hitting |CC2DRAWTOOLS| will show all the currently available tools. Of course, since the advanced drawing tool dialog do allow you to delete existing tools, there is also the possibility that the tool was supposed to be there, but has been deleted.