@Kathy--Brian-and-JB0:
I see what you are saying. The listing displays $115/night but then when someone looks at the specific days on the calendar they see $130 all the time and thus are charged $130 whether it is a week day or weekend.
Look at the calendar for that particular listing in your admin. What price shows on the individual days there? $115 or $130? If it is $115 during the week, then slide to the right and look at your pricing. Your Nightly price you've already confirmed to be $115, but skip down to extra charges and currency and confirm that you have no additional charges marked. Some people charge for additional guests, but accidentally leave the number of guests on 1. There may be something else that you have checked.
Check to make sure that smart pricing is turned off.
Check your season/weekend pricing under availability settings: Click availability settings in the charcoal colored bar, click the link "Add a requirement..." located just above the Sync Calendars link. Make sure you did not inadvertently set something there.
That's my best guesses. Perhaps another host will weigh in.