All my initial prints have come out very nice, but I finally came to the end of the spool of PLA that came with the printer. I had to change it in the middle of a job. The job continued and finished perfectly. This morning I changed the filament to a different color but still PLA. I started a job and left it alone to print. I didn't change any settings at all, just used what I've been using since I got the printer (defaults). I came in the room 3-4 hours into the print and noticed the left side in the front was curled just a bit off the bed. Then I looked at the right side and realized the print is not even at all. (see picture attached) I stopped the job because I knew it wasn't going to correct. I didn't expect to have this problem with PLA. Print bed was at 60Celsius. Not sure what the hotend was at. I just didn't pay attention to it. Has anybody else experienced this behavior with PLA and if so, how did you correct it.