I have tried re-sorting my contacts but it did not correct the contact search ability for me.
Also I noticed that if I edit a contact, it seems to keep it in a list seperate from the rest of the stored contacts, and it is only these edited ones which are shown in my searches. So, in order to not have to scroll through all of the contacts, I have to edit each contact that I want to be able to access quickly.
Any other suggestions?