What does a small increase in plasmocytes (0.07 - reference value <0.01 10e9/l) and a very high positive ana (homogeneous pattern >1:640) tell?

Nothing alone: This is not a "very high ANA" and many healthy people have titers this high. Counting plasmacytes is an unusual lab test and standards aren't well-understood. If you have clinical features suggestive of lupus, autoimmune hepatitis or one of the other illnesses in which there's usually ANA, this helps establish the diagnosis. Otherwise, keep living a healthy lifestyle &amp; don't trouble yourself.