Many of the problems with the original version of this logline are still in the current version. This is too long, confusing (as a result of the wording), and lacks detail in the descriptions.
Why butter sandwich? For comedy? If that's the case, it isn't adding much and you'd do well getting rid of it in the logline.
An accident opens the vortex, chance brings the characters together and more chance gets the bad guys involved in the story - there is too much reliance on accidental instances of chance. It would be better if the aliens open the vortex to the other dimension and threaten the Earth. This way there is a clear cause and effect relationship between the inciting incident and the goal for the main character.
Lastly, "...save the planet..." is a generic ambition - describe what the MC must do to save humanity. Must he kill the alien general? Use his 'fill the gap' computer smarts to close the vortex? What is the main action he does to achieve his goal?