internal storage reading wrong

Hey guys just bought the Samsung galaxy s3 so I mounted my old SD card with previous pictures and other files into this new phone.
I noticed that when I looked at the internal storage, files summing up to 86.5mb was being used internally.
I clicked on the pictures and videos category and brought me straight to my albums which were stored on my external SD card. I deleted a few pictures to find out if it was actually counting my external files as internal and it was .

Why is my phone doing this?? Can I resolve this issue?

Thank you for your time