The game will ignore empty tiers and skills assigned to be hidden (unchecked in the PFM pic) and snap everything to the left side of the skills screen, whether it looks pretty or not. Just like a spreadsheet, you have empty indents and rows, which character_skill_nodes_tables fills out based on the indent and tier provided. In this way, you can treat it like a spreadsheet. This is because there's nothing in indent 2 and 3, so the game intelligently centered it. Note that in PFM, Ungrim's fighting skills are in indent 1, but look like they're in indent 2.
Here's the entries for Ungrim in PFM (under character_skill_nodes_tables), and how the skills are arranged in-game to show the effects of indent and tier. To make this easier to understand, I'm going to compare the image of a character's skill tree in game to the table entries for it. When looking at the tables for the first time, it's easy to get overwhelmed with huge names, vague descriptions of fields, and the massive numbers of entries.
