This is most likely an issue with your printer driver, not with ID.
Happens on multiple printers. Through research it seems it may be an issue with operating system, not drivers. just looking for others who may have this issue or have had the issue and found a fix. It also happens in Acrobat as well. The problems seems to be linked to Custom page sizes and the use of Acrobat or Indesign provided crop marks.
We are having the same experience. OS 10.9.5 & Adobe CC14 (Ai, Ind, Ps, Acrobat Pro). Any use of a custom paper size and the print is scaled to fit, regardless that the scaling set to 100%. This is not a driver issue. It is (again) a problem between the Adobe apps and the Mac OS.
If anyone knows a good workaround or solution please speak up!