I am glad that you openly shared your query instead of keeping any assumption. The basis of this decision was their medical condition as both were in their 9th month of pregnancy and faced some medical issues earlier. So, we involved them in some other work related to carnival like collating and preparing classwise lists. If you ask me, "Why you were not considered" then I would say that while giving concessions, we place equity above equality. We may sit together to have discussion on this incase you need.
In response to your other query, I would like to state that some decisions are based upon leader's discretion and it won't be possible for me to post or share each case including every detail with everyone and I don't know whether eveyone would be interested in knowing that because I believe that we all trust each other. Having said that, I do take responsibility of clarifying the rationale of taking such decisions if anyone like to know the details.
Feel free to approach me for any clarity.
Warmly
Aruna