I'm wondering if they're ready for a bit more A time? It looks like the first nap was pretty good, but then after 2 hrs of A time, they weren't quite ready for sleep and the 40ish min nap would indicate UT to me. Have they tended to be on the high end of A time? At 5 mos, most lo's do 2 hr to 2.25, so I'm wondering if they're ready for that 2.25? I'm guessing your catnap was a no-go...again, they probably weren't tired, even though they had that short nap prior, it looks like they had just 1.5 hrs of A time, and that may have been too much of a cut in A time for them.
If you think they could handle more A time, I'd try extending that second A time of the day (it's fairly normal for the first A time to be the shortest, so you could keep that at 2 hrs if they continue to nap over an hour). I'd only do maybe 10 min every 3-5 days and see how they do with that.
btw - they are sooooooooo cute in your avatar!!!
hth
michelle