Usually institutes ask for three letters of reference for a postdoctoral position. Generically the first reference is the applicant's thesis adviser. Now my question is : does the ordering of second and third references matter? How should one choose the ordering?
For example, if an applicant is getting reference letters from a senior professor and a junior professor and he/she is quite sure that the junior prof. is going to give him/her a very strong letter. But he/she is not that sure about the strength of the other letter written by the senior prof. Who should he/she choose to be the 2nd reference?