Hi again, Gin!
The stickiness occurs for several reasons.
1--the use of oil to season the skillet. In the future, try using melted shortening or lard. Lard is preferable, unless you don't intend to use the skillet very often. Lard seasonings can go rancid quickly if you do not use the skillet on a regular basis.
2--too much oil. It really takes only a thin layer to season the skillet.
3--not a high enough temperature and not long enough in the oven. 350 for an hour is fine and is pretty much the standard instruction given by manufacturers. However, most manufacturers also recommend a second and even third seasoning at this temperature. I generally season new iron at 450 for 2 hours, letting it cool in the oven. This has eliminated a lot of the stickiness you tend to get with lower temps as well as the need for additional seasoning.
The stickiness will go away with use. The key to remember is that an initial seasoning is just that. Initial. The only way to get the true, smooth, shiny black nonstick surface cast iron is famous for is to use it use it use it! Start with high-fat foods (bacon is the most obvious) and avoid acidic foods like tomatoes until that seasoning is really built up.
Another thing that will help with that stickiness is to wash the skillet with hot water and a stiff bristled brush after using it, dry it on a stove top burner, and while it is still hot, coat it with another thin layer of oil, using a paper towel to wipe the oil around the skillet. Allow it to cool just to the point were it is handleable and then "buff" out the oil with a clean paper towel. All the initial care of a new skillet may seem like a lot of work and not worth the bother, but after several uses, it becomes unnecessary and the skillet will actually become the easiest of your cookware to care for.