Level open does'nt work and get back to main menu

Hi guys, i have a problem with level loading.
I have a map with a levelblueprint which calls a blueprint with a main menu. In the mainmenu there is an open level function that doesn’t work. It has to open a new map(not the first one), it opens the map, but a second later it get back to the main menu. In the console it gaves me this error: metadata mismatch. did you assign a stat to two groups.
Please help. I have also tried to pack the program to see if it works, but it does not. It works in the editor, but when i start the program own pricess it does not.

the open level works great in my project, could we have some blueprints screenshot to see the trouble ?

is it a client/server game or a standalone ?

Hi, here are the blueprints.
This is the mainmenu level blueprint

https://drive.google.com/file/d/0B8ANnhYqJFOdRHZmN0ZnamhQZlE/view?usp=drivesdk

which loads the widget blueprint

https://drive.google.com/file/d/0B8ANnhYqJFOdWHl0a2Nwb1FHMGc/view?usp=drivesdk

Here is the level blueprint of the level to be loaded.

https://drive.google.com/file/d/0B8ANnhYqJFOdZWtYWk5vcTVaZkE/view?usp=drivesdk

Thank you very much

So, if we read blueprints, there is too much widget(s) remover but I don’t thing it’s the problem …
Did you tried to delete contents in [game]/saved/StagedBuilds before packaging your game ? Sometimes it can’t delete files on my computer …