Yes your draw length can grow that much since you started depending on how your form developed over time. AMO draw length is measurement to deepest part of the grip at full draw + 1 3/4". Longbow to recurve can be confusing since the riser shapes are different. Also, grip 'wrist' height can cause you to close up or open up your draw depending on your biomechanics and what feels comfortable.
*In summary, DL is a very personal thing. Many folks open up their draw on a recurve with a medium to high wrist grip, many keep a bend in the elbow and close up a bit on a lower wrist longbow, but this is not a hard and fast rule. Your personal form will dictate what you do with any given bow.