No, you don't need to combine any entries. It sounds like you have two W2s from the same employer with one of them only reporting the "Overflow" item from box 14.
Enter the information as one W2 and you will have 5 box 14 categories listed. Each of the CAFs and the LST categories will be "Other not classified" and do not affect your tax return. The SUI category is "PA Unemployment" and will be included on Schedule A, if you itemize, automatically from your W2 entries.
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