I have a swap book too, and it does the same thing yours does. But I need both, so that if I can't find my book it is in my computer, and if my computer isn't working right it is in my book. Which I sometimes can't find. But it always turns up. It has every swap I have done since 2008 when I joined SCS. I treasure it.
Blessed are they who see beautiful things in humble places where other people see nothing.