Citizen complaint of the day: If you don't want visitors to ever park there, just come out and say it

A perplexed citizen notes conflicting parking signs on Beacon Hill:

The resident parking sign at the corner of River and Chestnut was recently modified to say "7am-7pm", with an arrow pointing forward. But the next sign has an arrow pointing backwards that says "7PM - 7AM". The two signs conflict with each other, creating a very confusing situation.