When moving a line or shape inside a frame with ctrl/alt/shift keys to select smaller or larger movement granularities this instead seems to move the entire frame surrounding frame either left or right. Moving a line or shape with the arrow keys on the keyboard works fine but when attempting to move in smaller (or larger) increments by also pressing alt or shift modifier keys this seems to move the entire surround frame instead of the arrow inside.
Any ideas if this is supported, expected behaviour or there is some other way to move an object in the frame in smaller than usual increments (relative to standard arrow keys)?