The first one looks good. If you keep your chem lab at 11:30 you'll be done class super early on Tuesdays which gives you more time to study which is awesome! Personally, I would leave it that way.
Since Math is mandatory there is basically no way that you are going to be done before 6pm in second term. You finish at 6:30, which really isn't that bad, even if you are commuting. If you're on campus, you have time to eat dinner before hand so after class you can just study anyway.
Both timetables look good. You need to keep in mind that the timetables are made by the school, and when they are released in early August courses that you have on your timetable generator ones may be full and you might not/probably won't be able to switch into them.
If you have any other questions, feel free to ask me!