I'm not a 23 and me member, or familiar with it, can you provide a screenshot to show the tree view you are looking for?
Also, DNA matching can be complicated and misleading at times, especially if there are multiple ways that DNA matches can have arrived (multiple ancestor branches that overlap) and it is just another tool. Different companies test different locations, different levels or types of tests provide different results based on the technologies used, etc.
There are also some very untested and unproven ways in which tests are applied that may or may not be valid (triangulation, for example) that Edison Williams has discussed at length in G2G.