Correct. So in all, you have done 2 experiments and there was an initial experiment (for comparison)
MY ROWS ARE MESSED UP! Will make a proper table to make it easier!
Initial: A B C Rate
1st exp A Double B C Double Rate
Now compare 1st exp, and 2nd exp:
1st exp A Double B C Double Rate
2nd exp Half A Double B C Half double rate =1/2 *2=1*Rate= Rate
Initial: A B C Rate
2nd exp Half A Double B C Half double rate =1/2 *2=1*Rate= Rate
Therefore, comparing initial and exp, same rate! A halves, B doubled, both first order
Any clearer?