I would say it's really up to you if you want to try to limit her nap and try for an earlier sleep time so you can get more peace and quiet in the evenings, because her overall length of sleep is about right for her age--13 hours.
She is definitely reaching the age where the length of nap can interfere with an early bedtime, or, at least with my dd, the time she wakes from her nap will interfere with an early bedtime. I think most lo's Sydnee's age have a 13+ hour day (from wakeup to bedtime)with about 5 to 5.5 hours of that after nap. It looks like Sydnee needs 5.5 hours after nap before she can fall asleep so I would set a time by which you will wake her ie. 3:30, then slowly bring that back to say 3:00 to allow her night sleep to adjust so she's napping closer to 2 hours during the day and lengthen night sleep to about 11.
It may be though that her nap isn't interfering with the night sleep but the long nap is makeing up for a short night's sleep. If her night sleep isn't lengthening when you shorten the nap you may be stuck for a while with the current schedule. I think some lo's are set for 10 hour night and she uses the long nap to make up for that. For a long while I couldn't budge Margot from a 10 hour night for love nor money, and even now that seems to be her "default" setting.
So I'd definitely try shortening the nap, but move slowly to see if night sleep adjusts ( I would imagine there will be a slight lag in the night sleep adjusting) Good luck and here's to an early night!