I think your wines will be fine. The following wine was stored in my Father-in-Laws basement (standing up part of the time) for 28 years before we drank it.
1975 Castiglion del Bosco Brunello di Montalcino - Italy, Tuscany, Montalcino, Brunello di Montalcino (3/10/2003)
I opened this wine with duck made by my wife. The 1975 Castiglion was simply glorious. The nose was earthy and pronounced with cherry and spice aromas. It showed no signs of fading. Notes of cherry, plum, indian spice, meat, kirsch and cassis were woven together in this wine. Sangiovese at its best. Extremely deep palate. This was a full bodied wine which showed dry tannins and then melted into a long caressing finish. It possessed the type of refinement which only develops in a mature wine. 93-94 points.