Are you doing any speed changes on the clips? Could be a source of the problem.
Could be a corrupt sequence. Try creating a new sequence with the same settings and copy the contents of the old sequence to the new sequence.
You can also just export a selfcontained qt of your sequence with current settings and color correct that. if I remember correctly, there's a way to export an xml to get your cut points into color.
Thanks for your suggestions, apologies for my delay replying.
I managed to figure it out and will explain for the communities future use.
When logging and transferring my footage the time code on the 2 problem clips started at around 23:45:07:12 and being a 100min+ video clip the time code went through to 00:00:00:00 and continued onward to around 01:25:07:12.
This time code has lead to color looking to the 23:45:07:12 location for each clip.
What I did was reset the time code for these clips in FCP to begin at 00:00:00:00 then sent to color again and copy and paste the grades I had made in the previous sequence...
Took some time but it was better that starting all my grades from scratch.
This time code issue is probably something really obvious but hey no one is perfect, hope this can help people in the same position.