I think that if your idea is good, it should acgreat timesulate enough votes by submitting earlier in the week to give you a good advantage over the last-minutes submitters. If you do have to change it, however, I would say this is the best idea.

man-man Posted:

Separate the submission period from the voting period imo. Eliminates bandwagon effects, blocks last minute rushes and ensures that everything is available for voting for the same amount of time.

The only problem is the Style voting, which could be eliminated by letting the people who submit the logo’s pick the style to go with it, but idk.