I do not know what is so difficult. Instead of paste and copy, why didn´t you just use the auto procedure of Hubpages? If you are logged in at adsense at the same time and press edit at hubpages then things will work automatically. You will receive then from adsense a mail to allow hubpages and then its in.
In adsense you can go to the setup page where you have the options to create a new channel and to add URL channel.
Press URL Channels and add the URLs of your hubs, then you will receive more detailed statistics from adsense and can see which articles have the most Ad Impressions.
Nevertheless be aware of two things. You only receive 70% of the revenue via Hubpages. In addition many internet Users have ad blockers and so more than half of the ads will not be displayed.
Therefore there is a huge difference between the Page Impressions in your statistics at Hubpages and the real number of valid ad impressions in adsense.
I would say it is a ratio of 1:5 to 1:10. So you loose 80-90% compared to the real Page Impressions.
If you then in addition use affiliate programms like Amazon, then it can happen that a visitor already has a cookie from a visit of another hub and then not you, but the other autor receives commission for the sales coming via your ads.