A few things can be an issue.
TGP
Point mod will latch on the picture, however when creating a SPI, projects through the imaged target through to the ground. Which if the Target is 10m in size, can place the SPI, depending on angle, off target behind the tally.
Fix
Use Area mode and set SPI slightly above where tire/tracks touch the earth. This will put SPI most certainly underneath the tally.
Other issues as some mentioned is to ensure you have your LASTE windage/temperatures accurate.
Fixing these alone will significantly improve your accuracy.
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