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I can't make the path line highlighted!

The line went as a path as a real SMW game, but not a hacked game. I can’t visibly see levels or path that animates.

I suffered this glitch because the lines didn't appear or highlighted, as the regular SMW level line still go animated. It is a problem.
You have to manually place the reveiled path. For that, switch to #lm{owev2} and place the tiles. You can switch between events by holding Pg-Up and -Down and the event number is seen at the bottom of Lunar Magic.
This doesn't count for layer 1 tiles, though, in which you select #lm{ow16x1} and change the level's tile setting with #lm{owlevel}. The bottom option of the setting menu is where you set the event when a path will. Unless the level is reveiled on a different overworld (e.g. Yoshi's Island to main map) in which you switch to #lm{owev1} and place the activate tile over the inactive one for the event the level is supposed to be reveiled.
The same happened every time I put 8x8 tiles in there with events in order. I changed the events and the path didn’t go straight or shown, as the path “glitches” as usual when I changed the events for several levels. (Let’s pretend I changed the events on 8 special levels from 1 to 8 instead of regular event numbers. It glitches.)
Did you make sure to have the proper event trigger?
For example if your level causes event 01, then make sure the event you change is event 01.