This is a lesser-seen case of the 'Transparency Acne' effect. CC3+ calculates edges by looking for differences in colors.

What happens here is that the lines doesn't go on top of the text, but because the text appears on top of the halftone lines, CC3+ sees differences where the fill has white pixels, and unchanges where they are black. This causes the glow on the text to behave as if the text was full of little holes, and fills those holes with the white glow.

The best way of handling that is to change the colors on your underground railroads from black to a dark grey, just pick the darkest one. Since it isn't black, CC3+ will see that as a difference, and you are fine.

Did you try Shessar's workaround above?

File -> Save as, then pick an image type such as .jpg. You'll probably want to hit the options button in the dialog AFTER picking the file type to set up the resolution you need.

Well, if you just want to use that zoomed-in portion as it is, then all you have to do is to use pick Rectangular section JPG when you save the map, this causes CC3+ to prompt you for two opposite corners that define your export area instead of exporting the entire map, this allows you to export arbitrary (rectangular) portions of it.

The wave fill is defined in each template, so you'll need to edit it for every map you want it changed in, but what you can do is to go to Symbols menu -> Symbol Manager, then check the box that says display fill style symbols. You should now find the Wave fill symbol in the list. Select it, and hit edit. Define the two corners of the editing window as CC3+ asks you to do, and then simply use :CC2MCHANGE: on the waves and make them black. Close the editing Window, and say yes to keep the changes.

For easy ways to place those symbols, either set up a snap grid matching the size of the symbols, or you could probalby get them placed on a line with Symbols Along using the appropriate parameters.

Also note that the change properties dialog defaults to the currently active settings as shown on the status bar, they are NOT showing the properties of the currently selected entity, so nothing is "reverting back" here.

Looks like the display have been corrupted somehow, this is not normal.

Does quitting and restarting the program help (it should automatically reload the last open map)? If so, you have a workaround, but you should probably still contact support.

Check with support. If you already own CC3+, they might provide you a copy of CC3 or find another way to provide you with a solution for getting the symbols.

Not as a finished feature built into the program, but you can do this using a Macro.

The Large Exports annual contain such a macro with explanations (the end result with this macro is to combine the individual tiles into one large image, but the start of the macro exports the map as smaller tiles.)