ID:2412573
 
Resolved
BYOND Version:512.1456
Operating System:Windows 7 Pro 64-bit
Web Browser:Chrome 70.0.3538.102
Applies to:Dream Maker
Status: Resolved

This issue has been resolved.
Although the reference says they default to 0, they seem to actually default to 1,-1.

Credits to Kaiochao to finding out.
Lummox JR resolved issue