The pot opening is fine. Water when the potting mix just dries out. Er, by waiting an extra day, if in doubt. Once the plant is out of bloom, I'd repot it to see how the roots look. That's the best indicator of the plant's health.
In the meantime, you can wait for the last buds to bloom on the spike; you can cut the spike high (just below the first blooming bract - the joint that the first bud came out of, that's probably already fallen off - trying to get it to rebloom on this spike; or you can cut the spike at its base and let the plant put its energy into growing bigger and healthier for next year's blooms.
The leaves look healthy - I'd think of choices one or two, but it's up to you.