Fnb sequencing of transection, my problem??

Yesterday I woke up to realise that all my debits orders went through, good news, I was aware that I might be a few hundred rands short so transferred the money to my cheque account. at that time of the transfer everything was well and communication with fnb through their sms was positive. 4 hours after I have transferred the money, and received communication that received an sms saying two of my debits orders bounced back and that comes with charges and a negative credit report. Should I be responsible for fnb's sequencing and communication problems and pay for that as well.