Hi, thanks for posting your query.
After going through your description I could understand that you have developed a mole last year which grew very slowly and now developed a second one 2weeks back.
You seem to have developed seborrheic keratosis
They can occur at any age, though more during older age. There is no specific cause of their occurrence at this stage of life. There is some hereditary predisposition.
It is a benign condition and are left as such but may be removed for cosmetic reasons.
It can be removed by electrocautery, radiocautery, laser ablation
, or liquid nitrogen.
You should get it checked and get it confirmed by a skin biopsy
Hope this solves your query.