A good first attempt in as far as the shape. as for the problems this is the learning curve as said above wood not dry enough and as Doug says bring the blanks indoors to make sure they are nice and dry I have a corner of the airing cupboard to place mine in so if they don't split then they pass the pen making test(luckily I don't make that many so get no complaints from her indoors).
If you do a search there is a post about out of round and plenty of advice there.
Keep at it and hopefully things will improve and in no time you will be producing some very nice pens
