Spelling Error In Email. Big deal or not?

Just sent out a response for final round interviews for a finance leadership development program at a major pharmaceutical company on the east coast. They asked for dates and times for either this week (I got the email on a Wednesday) or next week to conduct the interview. I gave my availability for next week thinking that I would have a couple extra days and the weekend to prepare. Do you think that this was a mistake? Is it possible that I would get dinged for this? They said this week OR next week and since there are only two days left I didn't think much of it to just send over next week's. 

Also, I made, what I believe, a minor grammar error. When I thanked them for the opportunity to continue onto final rounds I repeated "moving onto" twice. So it read as follows "I'm looking forward to moving to moving onto the final round of interviews"

How big of a deal do you think both of these errors are? Do you believe I will get dinged for this when they're making their final decision? Should I take some sort of corrective action?

I tend to get pretty anal about my grammar and syntax and everything so this was a huge hit to my ego and I definitely did not receive it well when I found out that I messed it up lol.