ACT scores- Plus Writing and regular?

In April I took the ACT plus Writing, and got a 28 composite. My writing score was a 9, my combined English and Writing was a 28.

This September I took the ACT again, this time without the writing portion. I managed a 31 composite, with a 34 in Reading and a 31 in English. (I wasn't able to finish the math in time so that brought me down score-wise)

Some of the colleges I am applying to require a Writing score, and I know some colleges will let you skip out of a Freshman Writing course if you received a certain score on the ACT Writing/English composite.

Does this mean I have to submit the test with the writing (The 28) to these schools rather than my more recent test, or can I submit the Plus Writing as a separate score from the ACT composite? I really do not have the time to take the ACT again, as I'm a senior and really need to start getting applications in. Basically I'm just kinda confused about the whole thing- The ACT site is no help, and neither are the colleges.

Thanks!