They lose time, where? On the Playchess server the times I have uploaded them they never lose due to time, in my tests they do not lose due to time, you must be specific, where they lose due to time and how you use the time options.
A friend of mine on PlayChess was using both Dark Sister and Spectral. He lost couple of games on time. He told me will stop using them, until it's time is fixed. You can try and talk to him. His nicks are : Auryn, Great Ozzie, and Ultima.
Among some changes, the next binaries are fixed from the indentations in the code, I currently have them in test versions and they are giving good results, in any case it is necessary to know how they use the time options, as I told you, I have not lost due to time. But it's great to get feedback from active users.
It's good that it has helped you with a lot of explanations to properly "read" Build Tester, many are guided by speed, but that's not all, there are several factors that we generally do not take into account.
Dear Cubail, the engines that Eduard Nemeth has built are very good and in general very well compiled, I have studied them a lot with Build Tester, apart from testing them against the betas that I make. Eduard not only makes high quality opening books, he also does the same with engines. He is a good reference that I respect.