K.E.
11 months is slightly young to transition to one nap but I know it happens. My DD is in the midst of transitioning now at 15.5 months but it's still hit or miss. At 11 months they should typically get around 14 hours of sleep in total so if he's getting that after adding all the hours up you can rest assured he's getting enough. It just sounds like it's a little too broken up. The one nap may be the answer for him and he may STTN more regularly. I have a friend who's 15 mo only ever took a 20 minute nap here and there and still doesn't always STTN! I think your fine - just in a transitional state and I know the teething doesn't help. Keep doing what you are doing. Some days he will need two naps and others just one. That's my story right now and it's been like this for a few weeks. I believe it just takes time. Good luck!