If your waypoint is the intended target then there is no need to "mark" it as a "Target" waypoint. Any waypoint, markpoint can have sensors slaved to them when selected.
If your having trouble getting hits using CCRP then make sure your waypoint or markpoint are set at ground level on the target. Also, as a side note I rarely use the actual waypoint as the strike point unless there is no TGP available.
If I have a TGP the flow is usually:
1. Slave TGP to waypoint/markpoint
2. Find target with TGP
3. Lase target, then TMS Long Up to set TGP aim point as SPI
4. Stop lase and then proceed with CCRP weapons delivery
*Note about #3: lasing before setting SPI will be more accurate otherwise the TGP may set SPI on the ground behind the intended target
If you dont have a TGP then ensure your waypoint (Target) is set at the correct elevation, otherwise CCRP drops will be off target