There are some known issues with the pairs given, based on issues with the requirements. Make sure to double check that the selected archetypes are actually compatible.
E.g. A Druid archetype that changes wild shape (Drovier), could be incorrectly listed as compatible with another druid archetype that changes a wild shape option gained at a specific level (Dragon Shaman).
The data for this is pulled from https://www.aonprd.com/.
The data has been cached to reduce the number of queries that this page sends to AoN. This means there may be a delay from when AoN adds new content to when it gets displayed here.