I have purchased two tickets on 24th, there was available places on 24,25,26,27. I picked 24 because it was about 220$ cheaper. The final cost from DAM to SYD per ticket is about 1400$.
Now I have two question:
1- I have mistakingly put my wife as MR not MRS, would this cause any problem?

2- What seats should I pick? This is my first time on Emirates, and most seats on my flights are empty. What do you recommend for seats preference?

My flights are:
EK 914
EK 384
EK 418