'Jesus the Christ' is perfectly acceptable and even sometimes considered more correct among people who know a little of the background of the Bible, because 'Christ' means 'anointed,' so 'the Christ' means 'the Anointed One.' The version without 'the' probably comes via Latin, where there aren't any articles. It's true that it doesn't make a lot of sense to alternate between the two in the same passage, as if 'Christ' were a name, but usage isn't always absolutely logical, and in English, 'Christ' has also come to be used like a name, even though it technically isn't.
Also, 'Lord' can refer to either Jesus or God; how else do you account for references to 'the Lord' throughout the entire Old Testament?
The spelling is indeed wrong, but if anyone's theology is dubious, I would say it's people who continue to use the phrase 'Holy Ghost,' as if they didn't speak modern English and were counting on Casper to show up in church.
Sorry, I don't mean to be so impatient, but really, if you presume to correct other people, you should get your facts right.