PinkAngel:
I also struggle with things like I wrote him instead of I wrote to him
Pink, does this extend to constructions with an explicit direct object, such as "I wrote him a letter" vs "I wrote to him a letter", the latter being very odd to my ears.
On the second matter, the merger of the -ly adverb with the adjective, I think you will find that this is a tendency for many varieties of English across many adverb/adjective pairs. Even where the adverb and adjective are different lexical items, there is confusion. Consider, 1) I spanked her well 2)I spanked her good 3) ??I spanked her well and proper 4) I spanked her good and proper.