I would say she was OT from the short nap.
And no, I wouldn't go later then 1pm. If anything I would start the morning nap a bit earlier to give you some more time but honestly, many babies will nap at 9 and 1 even with a good long am nap. I would stick with this pattern for a week before you change anything because you won't know for sure what's what.
9-11 months is notorious for sleep regressions and they often hit the naps hard, so I would be consistent with those times. If you want to start at 8:30 for the morning, then I would do that, but I really would not go later than 1pm for the afternoon one. Not until you see a week's worth of 26 minute PM naps at least.
How did she wake up from the 26 minute nap?