The tool shape outline clips at the -180/+180 longitude boundary but the tool value paints correctly across that boundary. There was a problem with earlier versions that caused one column at the ege of the image not to be painted. This problem was resolved in one of the beta versions, but you have to ask ProFantasy tech support for more access to that bit of software.

My recommendation has always been to put that edge condition into an ocean somewhere and don't mess with it (just like our good friends the British did here on Earth).

As an aside, latitude goes from pole to pole (up and down) while longitude goes around and around (left to right). To help you remember this, the long lines that go horizontally are lines of constant latitude or latitude lines.