potato confusion

I've managed to get myself into a right old pickle with my potatoes. At the end of March I planted two rows of 1st earlies, Lady Christl and Pentland Javelin. So far so good. Then I planted two rows of 2nd earlies, one was Nicola, and I can't remember what the other one was, I forgot to label them. I normally put in 10 per row for earlies and 7 per row for mains. Today, I took the remaining seed spuds down to the allotment and discovered I had Cara - enough for two rows, and Catriona x 10.
a) I don't even remember buying CAtriona and
b) I must have bought them as a 2nd early because there are 10 of them.

So, what have I planted in my second row of 2nd earlies???
I checked my notebook and I have written down (as well as the above) Kerrs Pink (main) and Wilja (2nd). No mention of Catriona.

It's a mystery. 

Cheer up the spuds don't know you made a mistake.
I find that some of my second earlies grow so big they think they're main crop!

Just plant the rest and have a surprise when you dig the others up

Cheers HH

Well at least there will be an exciting surprise when I come to rows 3 and 4, and I don't suppose I'll ever know for sure what it is I've planted! I do remember finding choosing which varieties to buy rather confusing at the time, but I didn't notice anything amiss when I set them out to chit. The most worrying thing is how frequently these 'senior moments' are starting to happen