Glyphs sort order sorts on individual numbers in stead of groups of numbers

I was working on a font with some specific symbols, with a lot of alternates. (first column)
Glyps sort them like the second column.
However, on export time, the names are replaced by a GID, with this wrong order, and when I use the InDesign Glyphs panel, they are sorted in the wrong order…

Is it possible to let Glyphs detect the whole number, and sort on that one?

Symbol
Symbol.alt1
Symbol.alt2
Symbol.alt3
Symbol.alt4
Symbol.alt5
Symbol.alt6
Symbol.alt7
Symbol.alt8
Symbol.alt9
Symbol.alt10
Symbol.alt11
Symbol.alt12
Symbol.alt13
Symbol.alt14

Symbol----->GID 1610
Symbol.alt10->GID 1611
Symbol.alt11->GID 1612
Symbol.alt12->GID 1613
Symbol.alt13->GID 1614
Symbol.alt14->GID 1615
Symbol.alt1–>GID 1616
Symbol.alt2–>GID 1617
Symbol.alt3–>GID 1618
Symbol.alt4–>GID 1619
Symbol.alt5–>GID 1620
Symbol.alt6–>GID 1621
Symbol.alt7–>GID 1622
Symbol.alt8–>GID 1623
Symbol.alt9–>GID 1624

Easiest solution: use two digits.
Symbol.alt01
Symbol.alt02
Symbol.alt03 etc.

More difficult: glyphOrder parameter.