bostonterrier

I need help!! I've been cutting with my US CUTTER Titan 3 and vinyl master cut for about 5 months without any issues. NOW tonight I'm having a problem... Issue one: In the middle of a project cut it just stopped....and I wasn't able to start again from where it stopped. Issue two: The vinyl keeps traveling when I'm doing an area test to start over now. Please...What am I doing wrong??!! Thank you for any help! Melissa