Unless your yarn won't stand up to ripping it out and restarting which is the worst case scenario, I think you should go ahead and try this. It's cute! I'm adding it to my list of Must Knits!
Short rows are very confusing at first. Once you get going with them it will get easier. I bet you can do it now. You can always ask any questions you have and if one explanation isn't working for you, another just might. I agree with Jan, pick a way to slip and stay consistent.
I should never overestimate my basic arithmetic skills.