I was super excited about making this design I came up with, until I finished the bag and saw the result...see pics below....

you can see here once i turned the bag right side out you could see the thread pulling at some of the seams. how do i avoid this??

here you see where i topstitched the satin part of the bag and the needle caused the fabric to "run". next to it i placed an example of the same fabric i had sewn in the same exact way (same needle, same thread, same interfacing) the next day and it didn't run. HELP!!! Why did this happen???
it's driving me nuts!