A mightily confusing window! There are some panels here which are obviously scenes from the Book of Exodus but there are others which are equally obviously hagiographic. The most likely explanation is that the designers of the Poitiers glazing programme used an identical medallion pattern (three upright hexagons per register) for two windows - presumably an Exodus window on the north side of the choir and a Life of St Blaise facing it on the south side. At some point a restorer has gathered together the 15 panels that survived (out of what would have been an original 48, assuming the current pattern is correct) and assembled them in a form that was at least aesthetically pleasing, even if the resultant narratives made little sense. Chigot then added his usual modernist panels to fill in the remaining gaps at the bottom.
Where this suggestion runs into difficulty however is that this window includes scenes of Moses witnessing the burning bush, the seventh plague and (possibly) the Israelites leaving Egypt, whilst the adjacent window (113a), with its design consisting of pairs of roundels, includes the first plague and other scenes that should interleave with these ones. It is possible that the original windows were comprised of alternating registers with two roundels and three hexagons each, although even this explanation is tricky because the positions of the vertical glazing bars in the two windows do not match.