P deliciosa can and does bloom from the same spike(s) for a long time. It's what this species does. It'll bloom for a long time and then it will rest a bit...and then it'll fire back up again and make more buds on the same spikes. Eventually the spikes will have lived as long as they are going to live and they will stop producing and dry up. No need to worry...it's what a healthy deliciosa does.
I have one deliciosa "mounted" in a tree fern pot and hanging vertically and one in a pot. The hanging one is easier to deal w/than my potted one. Both of them I stake the spikes w/little wire stakes for better display and so they aren't hanging everywhere. I use wire...bend the end so it has a little hook and it'll hold the spike securely in place.
Again, no need to worry...it sounds like you have a very healthy and happy phal.
I've never cut one of the spikes but I have broken one (hence the stakes now) and it didn't branch...it died off. I don't know if that's the usual situation or if that spike was just done but, personally, I wouldn't cut them.
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