Split objects into parts oddity

[LePaul 328]

Running 15.04.2, Windows 10 64-bit

I had a part that has more pieces than could fit on the build plate.

Did the first bunch of these pieces, all identical, with no issues. Essentially 6 "L" shaped pieces

Had to wait a few hours to delete those pieces off the screen, then drag the remaining pieces onto the Cura buildplate. (Ultimaker Original w/ Heated Bed)

Made sure the first few layers went well then walked away.

When completed, these pieces were all sloped. Not perfectly straight, vertical pieces. No issues I can see with the printer, belts are fine. Never had this happen before. Here's how they came out.

[ultiarjan 1,223]

I assume the slope issue is all in the same (x or y) direction? Did you check if the pully screws on the xy motors are tight?

[LePaul 328]

As mentioned...yes!