I'm pretty sure, it happens because of some tool conflict. Specifically, some tools like AddmusicK, the UberASM tool, PIXI and GIEPY put their ASM data into the folder "asm". Unfortunatelly, it also has got the problem that each tool overwrites their data.
I put the tools in seperate folders and use batch files to run the tool.
I, for example, use a drag and drop batch file. In order to do this, simply copdy the following code into notepad:
Code@echo off
cd folder
tool.exe %1
pause
Next, remember to replace "folder" with however you have named folder the tool is located and "tool.exe" with however the tool's name is (quotes are optional and allows you to use).
Finally, save the batch file however you want (I use "_tool_name.bat" i.e. the tool name with a prefixed underline so that it's first when alphabethically sorted) but keep the file ending in mind: The name
has to end with ".bat" (without quotes). Furthermore, if you use the regular notepad and some other text editors, you have to select the file type under "All Files" so that notepad determines the extension and thus save it here as a batch file instead to save the file as a text file. Other text editors like Notepad++ are smarter and detect the extension automatically (in fact, "has to" is in italic because you can even chose the file type in some of the text editors so you don't need to put ".bat" at the end).