Is there a bug in the annotations that creates excess margins when then annotations are not aligned with the plot edges?

Q&A
2

I tried your example with gmt 6.0.0, 6.1.0 and 6.2.0.
Using the command:
gmt psconvert -A -Te -E72 file.ps

to get the eps file, all were 183x124 in size, what is about 6.45583cm in width.

Could be a issue with Illustrator?