Is it possible to get “lost in time” during time travel, or are compatriots in the “base time” you left, able to track you and “keep you tethered,” so to speak, regardless of how things are altered or manipulated, unless you managed to get yourself killed, which I assume would require a time “rescue” where a compatriot must travel back to an even earlier time to “save” you?

You cannot truly understand an answer to this question without understanding the nature of the technologies and what they do. In effect, what you are talking about is not needed. If you are controlling your time travel, you will have the means to do anything needed. If there is a death that happens along the way, you will go back to the light and you will not have an opportunity until you reincarnate to do anything to manipulate what took place, but you could potentially come back and undo it. It would not undo the reality of your death in that timeline and all that happened as a consequence of that death, so this is a kind of creation of multiple outcomes that you are proposing here because it would have been recorded in the akashic records, it would not be undone, but there would be, in addition, a new timeline aspect of having your energy reappear and take place in addition to what was on record previously. This seems overly complicated, but is not a problem for the akashic records to accommodate and that is because of the fluidity of time to begin with, that much of what is in the akashic records is a series of loopings of energy from the same sources as they come and go across time and move among dimensions. This is vastly more complex than you are used to thinking about, and so it is daunting for you with your linear time illusion as the basis of life experience to now begin to think in a multidimensional matrix of possibilities, but we can assure you it is manageable and can be understood when in light being mode.