So I started slotting Alpha > Musculature and I'm currently on T3 on right side. I just noticed that I'd like to build towards T4 left side, but I'm already building on right side. I see that both T4 powers require two T3s - one right side and one left side. I asked someone what I needed to do to switch sides, and was told that I'd have to restart at T1 and build a left side, then when I have both a right and left side T3, I can pick whatever side T4 I want. Question is, why do I need to start back at T1? Shouldn't the game already know that I had a T1 earlier on? So if the tree completely disregards that I had a T1 crafted at the very beginning, what assurance is there that if I swap over to left side, it's going to remember I had anything crafted on the right?