Making a timetable is so hectic.
I ended up with biology 1m03 and biology 1a03 in the same term.
Most people say that it isn't recommended but everything seems to be full or in a conflict now.
Is it possible to manage both or should I continue playing around with my schedule?
How about doing it in the summer?
The perks of being a procrastinator...

There's not really anything anyone can tell you that you don't already know. It's not recommended, but it is allowed. It's obviously possible to manage both. You can do one in the summer if you want to - that's really up to you.
If you want a helpful answer, go talk to the academic advisors and see if they can help with moving your schedule around a bit so that you can get into the sections you need. Alternatively, you can come up with a schedule with a conflict and then ask the prof or coordinator for one of the courses if they can allow you into a separate section, and show them your schedule with proof of the conflict.

its actually not as bad as you would think it to be. Both of them really aren't pre-req's for each other so its not that taking one prepares you for another one or such.