In some haggadot, I have seen the numbers of sections as being 14, with Motzi Matzah being combined, and in other haggadot, I have seen 15 with them separated. What is the reason behind each side?
Technically what's happening at this stage is that you make two blessings, 'hamotzi' and 'al akhilas matza' and then eat one portion for each blessing. The side that puts it all together might do so because both blessings/portions are being done at once. The other side would say that since it's really two steps, they should be split.