The 'Gulfstream 150' that they are supposed to be repossessing, is actually a Global Express.
The blood stain on Juliet's shirt doesn't align with the site of her previous bullet wound.
TC talking to Magnum on the radio ends by saying "over and out." TC (as well as Magnum and Rick) being in the military would never say that. "Over" means the speaker has finished and is awaiting a response. "Out" means the communication is finished.
As Higgins and Magnum enter the plane and go to the cockpit, the door is still open and no one has closed it which is required as they are manual doors on a Gulfstream G150. Yet as they take off, the door is closed.