You are in the process of determining the ami-no acid sequence of a peptide. After trypsin digestion

Question:

You are in the process of determining the ami-no acid sequence of a peptide. After trypsin digestion followed by the Edman degradation, you see the following peptide fragments:
Leu!Gly!Arg
Gly!Ser!Phe!Tyr!Asn!His
Ser!Glu!Asp!Met!Cys!Lys
Thr!Tyr!Glu!Val!Cys!Met!His
What is abnormal concerning these results? What might have been the problem that caused it?