Syncing mapmyrun and myfitnesspal

Hello all
Had a look around but cant seem to find the answer so if anyone has any info that would be great.
I recently started using myfitness pal and have linked it to mapmyrun. It says they are linked and syncing but if I do use mapmyrun the exercise doesn't cross over into today's diary. I have to manually add this in via cardio or strength.
Is this right or am I doing something wrong?
Thanks for your help.