Yup, consolidate, that should be one index.
The only counter case for keeping it separate would be where queries that use those indexes absolutely must run as fast as possible and not a microsecond more, in that limited case you would probably want multiple indexes for the fastest access possible (larger indexes = more data).
Gail Shaw
Microsoft Certified Master: SQL Server, MVP, M.Sc (Comp Sci)
SQL In The Wild: Discussions on DB performance with occasional diversions into recoverability