If IF C9H10O2 is the empirical formula formula and not the molecular formula, then the most likely explanation of the two triplets is that you have three chemically equivalent copies of X-CH2-CH2-Y. If X and Y are not identical, you would expect two triplets with area 3x(2:2)=6:6 which is a multiple of 3:3. 3:3. (IF the areas are reliable ... Were the spectra acquired with adequate relaxation delay?)

The doublet of doublets is probably due to an aromatic or heteroaromatic with C2 symmetry.