I have Polydactyly, 6 toes on one foot, is this common?
No, I think this is very rare. Is it just soft tissue that can be removed?
no it a real toe with bone and nail and everything
Has this caused any problems for you?
no pain, but just embarrassment to go barefooted and need a wider shoe for it.
Well I can see it being embarrassing to be barefoot. On the other hand shoes can cause problems such as bunions and hammer toe, especially if you have an extra toe. 
yea,  I always have to buy a wider shoe to accommodate for my extra toe
Hammer toe
A hammer toe or contracted toe is a deformity of the muscles and ligaments of the proximal interphalangeal joint of the second, third, or fourth toe causing it to be bent, resembling a hammer. In the early stage a flexible hammertoe is movable at the joints; a rigid hammertoe joint can't be moved and usually requires surgery. 
Mallet toe is a similar condition affecting the distal interphalangeal joint.
Claw toe is another similar condition, with dorsiflexion of the proximal phalanx on the lesser metatarsophalangeal joint,
Polydactyly
Polydactyly or polydactylism (), also known as hyperdactyly, is a congenital physical anomaly in humans and animals resulting in supernumerary fingers and/or toes. Polydactyly is the opposite of oligodactyly (fewer fingers or toes).
Signs and symptoms.
In humans/animals this condition can present itself on one or both hands. The extra digit is usually a small piece of soft tissue that can be removed. Occasionally it contains bone without joints; rarely it may be a complete functioning digit. The extra digit is most