Here's what I have for Symphony of the Seas so far. This goes with my last post

So my question is, in my Symphony of the Seas composition, about halfway into the piece these strange lines that look like regular barlines keep appearing whenever I load the piece. Whenever I make a change of any sort to the piece, the lines duplicate and/or multiply, making the run-time slower because the program thinks that there are more notes being added. Sometimes my progress is even deleted, even though I save it. Please hepp mehh....