I would say the flowers on the plant in post #5 look a lot like those one would expect for A. maculata and not at all like those of A. zebrina, but that basically just means it is not A. zebrina, and it could be some other spotted Aloe. However, the flowers are definitely A. maculata-like just a little more open than one would expect - that flat topped inflorescence of the plants in your pictures is very distinctive for the species -, but this could be because of growing conditions or could indicate it is a hybrid.
If the plant came with the A. saponaria label, my guess would be that it is either the correct plant just with a different shape (see below) or a hybrid of that plant - especially if it was grown from seed. Aloes hybridize incredibly easily and if it was propagated from seed from a plant that was open pollinated all bets are off in terms of it being a pure A. maculata. And that assumes that the nursery that grew the plant at least put the correct name to the best of its ability on the plant (which is unfortunately not always the case).
I quote from the entry for A. maculata in the 'Guide to the Aloes of South Africa' by van Wyck and Smith: 'The broadly triangular leaves vary considerably in length and shape...' and 'It hybridizes readily with a number of other Aloes, both in habitat and in gardens.'
Without flowers, I would not want to hazard a guess at the plant in post 1, because just looking a the 'Guide to Aloes of South Africa' in which 26 different spotted Aloes are listed and they all look very similar, and that selection is just limited to South Africa...
So the bottom line is: if you get one of these without a label (and in some case even if you get it with a label) getting an ID is going to be really hard, especially if the plant has not flowered yet. And even with flowers it is not always clear cut.