Good job! I got the same score as you on my first. My second score was lower, cause I ran out of time/freaked out. Just so you know, topscore gen chem is too detailed when it comes to calculations - on the real test they will not have questions that are so close. I just took my 3rd test today and got a 22 TS! I am happy about that score - got a 19 BIO, 23 gchem, and 30 ochem. Do you find bio to be very detailed in topscore?
I think you are going to rock the DAT! good luck and keep practicing!