Most vanilla ammunition inventory items have display names formatted like this:
6.5 mm 200Rnd Belt Tracer (Yellow)
However, there are two magazines that are formatted differently, with no space between the number and the "mm" in the calibre:
6.5mm 200Rnd Belt Tracer (Red) 9.3mm 150Rnd Belt
Because of how Arma sorts lists by display name, e.g. in Editor inventory attributes and in the Virtual Arsenal, this causes these magazines to be listed separately from similar magazines. For example, while most Mk200 belts appear before the 6.5 30rd magazines, the Tracer (Red) belt appears after the 30rd mags. The Navid belt is less affected because there are no other Navid belts to separate it from, but the principle applies.
While this is a very minor issue, it should be correspondingly easy to fix, as it's purely a text string issue.