Within the Domain Manager, TLDs can be sorted on the TLD Pricing page, by drag and drop. This sort order appears to be ignored by the domain availability search box within the Order system.
TLDs on the TLD pricing page are sorted top to bottom, these should be shown left to right on the order page.
It's possible that other TLDs may appear in mixed order with spotlight TLDs. It's ok if this impacts the order that they are displayed when clicking "Show All"
For example..
.com
.net
.org
.biz
If .com and .org are spotlight TLDs, then we would see the following on the order page:
[ ].com [ ].org [Show All]
It's fine if clicking the Show All button then includes the missing TLDs after the last spotlight TLD, rather than re-ordering them all.
[ ].com [ ].org [ ].net [ ].biz