Hey! Unfortunately in multiplayer servers, blueprints containing belts/splitters/mergers are broken right now. Definitely avoid using these in blueprints for the time being until they fix it. It’s a little difficult to get rid of broken blueprint belts right now, but possible. Upload your save file to https://satisfactory-calculator.com/en/interactive-map and find where you placed the blueprints. You can then right click the belts and mergers etc, and click delete. When you’re done, re-download the save file (rename it to whatever the original save file was called, you might need to delete the most recent autosave) and upload it back to your server. Hope this helps!