Some of the compensation legacy standard fields are not reportable.
There are some legacy fields like totalincrease that may not be reportable in adhoc. The workaround is to create a custom field in column designer and point to totalincrease and make it reportable.
Here is a knowledge base article on how to configure a custom field for reportable purposes.
KBA , LOD-SF-CMP-REP , Reporting & Analytics, Data Imports & Exports , Problem