Decklink Captures Frame Early

We digitize dailies into a Final Cut using the Blackmagic Decklink HD Extreme 3 card. However we occasionally get events that digitize a frame early. This can vary from one event each reel to half of the entire reel.
We do have a bit of a convoluted path: footage is coming from HDCam 1080psf 23.98 through an Evertz afterburner which downconverts the footage to standard def 29.97 with a 3:2 pulldown. We're then using the Decklink to remove the 3:2 pulldown back to 24 frames into the Final Cut. Now I'm pretty sure that the reason it's digitizing a frame early on the odd event because it's having trouble locking up but I thought I'd throw it out there just in case anyone else has come across this and has a solution.
And the obvious suggestion is to try a different path but this is the path we MUST use based on all the client's requirements. Thanks for any help!
2x2.66 GHz Quad-Core Intel Xeon
6 GB 1066 MHz DDR3 OSX 10.5.8
FCP 7.0.2
Blackmagic Decklnk 7.6.3 Decklink HD Extreme 3

I believe you want to "pin" the music. Look in the Help for "Work with audio and music".

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