[Mobhack]

There are 4 sorts, shown on the LHS column:

Default order is the OOB order. That is how the designer put his units into the OOB. Its the standard Encyclopaedia view.

Unit type uses the internal game types (CT_TANK, CT_APC, CT_GUN etc) which aren't a "Mobhack" available field. Just something that the internal game code uses e.g. for AI purposes. That will put all the generic tank-like "types" together, or all the guns but not in any particular unit class order.

Unit class will put all the units of a UC together, but unit classes are not allocated in blocks, so all tank types aren't together in one block of UC numbers. All Infantry tank, Cruiser Gun Tank etc will be - but in numeric UC blocks mixed up with infantry etc in between.

Date Available is a different sort - and will show an apparent jumbled mess of units since it is a sort on start dates. Its not a sort on type or unit class.

The 2 filters on the RHS are basically "all dates" which shows all the unit dates, and "current date" which filters down to stuff available at the current battle date. If you are in a game, that date will be the battle date, but if you are in the main game screens and bring up the encyclopaedia there, then it will use the default battle date as set in your preferences. Neither of the 2 filters on the RHS are date-ordered sub sorts - just a filter for showing "all stuff" or "current stuff only".

This could be what is confusing?. The only date order sort is the one on the LHS, which is all units sorted by start date. There is not any way to sort by "unit type" or "Unit class" sub-sorted into availability date order.

I'll probably move date order to its own separate (a third) filter, probably under "all dates" and "current date" since as a stand-alone sort on its own it is not that useful. So then you could sort by unit type, in availability date order, filtered for all or current date only.