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This is pretty standard for glads. If you look at the cut ones you get in the store, very often, the bottom buds are wide open while the top are still tightly shut.

You may be able to extend flowering some by increasing water. That should help some.

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You should not need to dig them up where you are. You need to make sure that you leave the foliage in place after they bloom. They build up energy from the leaves for the next blooming cycle. Also, try giving them some bone meal which will help boost the phosphorous they need to bloom.

Fertilizer is a hot button among plant people; it probably stirs up more debate than any other single subject, and specialists develop many different mixtures for every imaginable situation and plant variety. So there's no one "right" or "best" way. That being said, your soil analysis shows that you need to do something to lower pH - glads like a pH 6-6.5. This article will give you some ideas: https://www.gardeningknowhow.com/garden-how-to/soil-fertilizers/raise-acid-level-soil.htm Also, you'll want to concentrate especially on raising P and increasing OM. My personal recommendation would be to work in as much organic matter as possible, especially a lot of peat and bone meal, then fertilize as recommended with a high-phosphorous (1-2-1 ratio) fertilizer. This article goes into more detail about fertilizing bulbs: https://www.gardeningknowhow.com/ornamental/bulbs/bgen/preparing-soil-for-bulbs-and-fertilizing-bulbs.htm
Remember that the size of your flower stems and flowers is going to depend a lot on the variety you're using. This article goes into more detail, and recommends 2lbs of 5-10-5 per 100 sq.ft.: https://extension.missouri.edu/p/g6620

I think in your position I would try to put the glads into pots of soil and keep them in a shady spot until the herbicide has dissipated, at which point I would put them back in their accustomed bed. They use their green leaves to produce food which is stored in their bulbs; if they haven't been allowed to do their food making, the bulbs will be weakened, and will be unlikely to grow at all if you keep them in storage for the better part of a year. You may not get any flowers this year, and possibly next year's flowering will be impacted, but after a full cycle, they should be fine.

Here is an article that will give you an overview of herbicide use, as will as alternative methods to weed control among your glads: http://extension.umass.edu/floriculture/fact-sheets/weed-management-outdoor-cut-flowers